1. Announcement:
    Want access to a chatbox?
    Dason ‎(Devorador de queso)
    05-10-2017
    Views:
    1,931
+ Post New Thread
Page 2 of 294 FirstFirst 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 52 102 ... LastLast
Threads 61 to 120 of 17595

Forum: Statistics

Statistics course and homework discussion. Elementary statistics.

  1. Sticky Thread Sticky: Forum Guidelines: Smart posting behavior pays off

    Welcome to talkstats.com, the place for statistics help. This is a guideline for people who want to ask a question on this forum and value a...

    Started by TheEcologist‎, 11-27-2010 12:13 PM
    • Replies: 1
    • Views: 197,205
    07-16-2014, 11:01 AM Go to last post
  2. Arrow Sticky Thread Sticky: We only provide homework help to those who show effort

    Welcome to Talk Stats Forum. In order to keep homework help effective and efficient, we request all members to abide by these guidelines: 1)...

    Started by quark‎, 09-30-2005 09:44 AM
    • Replies: 0
    • Views: 66,982
    09-30-2005, 09:44 AM Go to last post
  1. best test to determine if two proportions are different

    Dear all, Let me first state my problem. I am analyzing a genome and its genes. I can calculate proportions of different types of genes in the...

    Started by Federico‎, 08-22-2012 03:05 PM
    2 Pages
    1 2
    • Replies: 21
    • Views: 5,289
    08-28-2012, 10:00 PM Go to last post
  2. Doing a stats assignment with R. Would love some advice on what stats tests to run

    We've been given data for 9 different genomes of fruitfly. These have then been split into 3 groups based on their overall effect on the fly's...

    Started by Cam‎, 11-20-2012 05:23 PM
    2 Pages
    1 2
    • Replies: 21
    • Views: 3,339
    11-24-2012, 12:22 PM Go to last post
  3. Meaning of P-value when generating Pearson's R correlation coefficient ???

    I know how to generate Pearson's r correlation values in Excel and in R. I understand the meaning of the value as it ranges from -1<r<1 I also...

    Started by CrunchAndSee‎, 01-02-2015 08:12 PM
    2 Pages
    1 2
    • Replies: 21
    • Views: 9,358
    01-14-2015, 12:01 PM Go to last post
  4. Pool data and compare data for my systematic review

    Hello everybody, I am new to this website and to statistics as well. Currently I am writing a systematic review on complications and reoperations...

    Started by Rotterdam‎, 01-27-2017 10:16 AM
    2 Pages
    1 2
    • Replies: 21
    • Views: 5,706
    02-10-2017, 11:21 AM Go to last post
  5. Would this Likert scale count as interval?

    Hi everyone. A simple question please. I have been reading that there is a huge debate on whether nominal Likert scales (agree, disagree) can be used...

    Started by graphicsgriffin‎, 06-26-2011 12:33 PM
    2 Pages
    1 2
    • Replies: 20
    • Views: 7,389
    07-03-2011, 11:17 PM Go to last post
  6. Norms and standardization

    As a starter, my question is very simple. How to apply norms and standardize a test. I have two tools - One with 120 items and another with...

    Started by rockyallen7771‎, 11-05-2010 12:35 PM
    2 Pages
    1 2
    • Replies: 20
    • Views: 9,165
    11-08-2010, 08:19 AM Go to last post
  7. P-value when one data set has all zero values

    Hi Forum :) I am currently comparing data sets of insects caught in pitfall traps from two sites with Mann-Whitney tests. There are 20 samples in...

    Started by Entomologist‎, 11-10-2011 10:14 AM
    2 Pages
    1 2
    • Replies: 20
    • Views: 9,584
    11-15-2011, 11:37 PM Go to last post
  8. Feedback on Graph Desired

    I have generated a graph (using R) to plot Frey Readability (LINK) for text (I'm applying this formula to spoken dialogue). This graph is part of a...

    Started by trinker‎, 12-30-2011 12:27 PM
    2 Pages
    1 2
    • Replies: 20
    • Views: 4,428
    11-22-2014, 11:31 AM Go to last post
  9. [SOLVED] Expected Value of Order Statistics from Standard Normal Distribution

    Question: Find the expected value of the largest order statistic in a random sample of size 4 from the standard normal distribution. Remarks: I...

    Started by DHB10‎, 01-21-2012 03:39 PM
    2 Pages
    1 2
    • Replies: 20
    • Views: 20,636
    02-01-2012, 06:03 AM Go to last post
  10. How do I prove something is a variance matrix?

    I'm not sure about this but if i recall correctly there was a property of matricies to show a matrix was a variance matrix. Was it that every...

    Started by c2q‎, 03-04-2012 09:19 PM
    2 Pages
    1 2
    • Replies: 20
    • Views: 5,275
    03-06-2012, 09:54 PM Go to last post
  11. 2-way ANOVA Normality Requirements

    Greetings, My objective is to conduct a 2-way anova (equal sample sizes/246 samples) in R. After running the Shapiro-Wilk normality test on the...

    Started by Ben Packard‎, 07-30-2012 03:48 PM
    2 Pages
    1 2
    • Replies: 20
    • Views: 11,725
    08-03-2012, 05:13 PM Go to last post
  12. Odds ratio calculation

    Hey guys. I've been doing some work during the holidays and there's one thing I've been having trouble with. I'm doing a personal study...

    Started by starpen‎, 08-11-2012 05:47 PM
    2 Pages
    1 2
    odds, odds ratio, social science
    • Replies: 20
    • Views: 5,778
    08-12-2012, 06:10 PM Go to last post
  13. help me...

    I am a researcher in data mining and I am master student in Engineering Computer. I have one problem in my research. my thesis topic is "mining in...

    Started by mahdieh‎, 10-04-2012 03:12 PM
    2 Pages
    1 2
    • Replies: 20
    • Views: 3,024
    10-05-2012, 12:33 PM Go to last post
  14. building confidence interval for a simulated estimate

    Hi, the context : I'm using a basic logistic regression model on my data, and the values of interest are the basic estimates : Beta regression...

    Started by Alex C‎, 06-03-2013 02:07 PM
    2 Pages
    1 2
    • Replies: 20
    • Views: 3,954
    06-06-2013, 10:46 AM Go to last post
  15. is there sig difference between 2 school?-theory question

    the question is to know whether the diffence sig between 2school ipad user coverage. data is below: my thought is 900/1000 =0.9 ,1400/1960=0.71,...

    Started by nicegirl‎, 09-27-2014 10:10 PM
    2 Pages
    1 2
    • Replies: 20
    • Views: 4,517
    10-02-2014, 10:38 AM Go to last post
  16. Chi square test of independence - test of difference or association?

    Hi everyone, I understand chi square tests of independence, and have read the FAQ on chi square tests. What confuses me somewhat is the use of chi...

    Started by Frodo/Sociology‎, 06-28-2016 09:35 AM
    2 Pages
    1 2
    • Replies: 20
    • Views: 3,925
    07-05-2016, 01:42 AM Go to last post
  17. A Soldier in Combat need help with Discussion (Monty Hall)

    Can anyone please tell me in Statistics with the following A number of years ago, there was a popular television game show called "Let's Make a...

    Started by Deshun1970‎, 03-19-2011 06:26 PM
    2 Pages
    1 2
    • Replies: 19
    • Views: 11,159
    03-21-2011, 03:26 PM Go to last post
  18. math to compute width of gaussian PDF(x) given sigma & N values of random variable x

    Hi Experts, I'm working in industry and have an application requiring some expert knowledge on statistics/probability. I have a probability...

    Started by tim8691‎, 06-17-2011 01:30 PM
    2 Pages
    1 2
    industry, pdf, probability, statistics
    • Replies: 19
    • Views: 5,247
    06-17-2011, 08:06 PM Go to last post
  19. How many combinations?

    Hi all - I wonder if this might be the place to to find an answer to this question. I am trying to work out whether a key-safe I am thinking of...

    Started by sebbyh‎, 08-05-2011 01:17 PM
    2 Pages
    1 2
    • Replies: 19
    • Views: 7,754
    08-06-2011, 10:32 AM Go to last post
  20. Outlier analysis

    I am going to carry out an outlier analysis. Specifically on the number of hits on a given case per user. I need to answer several questions I have...

    Started by noetsi‎, 10-17-2011 02:29 PM
    2 Pages
    1 2
    • Replies: 19
    • Views: 5,211
    10-18-2011, 11:48 AM Go to last post
  21. Transform data to use ANOVA?

    Hey, I have a set of non-normal data that I need to run an ANOVA on. Do you think I would get away with transforming the data to do it, since one...

    Started by statn00b‎, 11-23-2011 11:42 AM
    2 Pages
    1 2
    • Replies: 19
    • Views: 21,816
    11-23-2011, 05:48 PM Go to last post
  22. Uniformly most powerful test

    Let X1, X2,...Xn be a random sample from the distribution having pdf: f(x|theta)=theta^2 * x * e^(-theta * x), where x>theta and theta>0 I...

    Started by Darktranquillity‎, 11-30-2011 01:06 PM
    2 Pages
    1 2
    • Replies: 19
    • Views: 7,891
    12-01-2011, 04:41 PM Go to last post
  23. Analysis of Entomological Findings Help

    Solved....

    Started by Forensic Entomologist‎, 02-03-2012 01:51 PM
    2 Pages
    1 2
    • Replies: 19
    • Views: 4,134
    02-03-2012, 05:13 PM Go to last post
  24. What is the role of the test statistic? [I'm not talking about the p-value]

    For example when Shapiro-Wilk test shows the statistic .945, df=12, p-value=.563 I know it's 'not significant' and I retain the H0 hypothesis, but I...

    Started by Magnetar‎, 07-17-2012 12:27 PM
    2 Pages
    1 2
    normal distribution, normality, shapiro-wilk, test statistic
    • Replies: 19
    • Views: 5,425
    07-18-2012, 01:22 PM Go to last post
  25. Univariate, Bivariate, Multivariate: Myths and facts

    This is not a question but a summarization of my recent learnings regarding the common mistakes in calling different types of analyses, and to...

    Started by victorxstc‎, 08-20-2013 10:58 AM
    2 Pages
    1 2
    bivariate, multivariate, regression, univariate
    • Replies: 19
    • Views: 4,646
    12-17-2013, 04:06 PM Go to last post
  26. Concept of P value

    Hi Guys Recently I started working towards improving my understanding of basic concepts of statistics and have read a few posts/books online about...

    Started by excelmac‎, 09-21-2013 09:59 PM
    2 Pages
    1 2
    • Replies: 19
    • Views: 7,058
    09-26-2013, 06:51 PM Go to last post
  27. Unhappy I need to solve step by step these statistic problems

    I need to solve step by step these statistic problems, please do not use software, statistic tables are ok

    Started by luckystar‎, 11-23-2014 04:33 PM
    2 Pages
    1 2
    homework
    • Replies: 19
    • Views: 4,420
    12-01-2014, 06:56 PM Go to last post
  28. Interaction test

    I have a binary outcome and a binary independent variable, and am using an interaction test in SAS to determine whether sex (male vs female) modifies...

    Started by martink‎, 01-25-2017 03:10 PM
    2 Pages
    1 2
    • Replies: 19
    • Views: 4,997
    02-03-2017, 03:28 AM Go to last post
  29. p-value v sample size

    p-values & sample sizes in clinical trials Hi people, I have almost zero experience with biostatistics or statistics in general, but my boss has...

    Started by monosierra‎, 05-19-2011 01:17 PM
    2 Pages
    1 2
    • Replies: 18
    • Views: 42,109
    05-21-2011, 11:38 PM Go to last post
  30. Data visualization poll

    Hi, Originally, I thought this might be appropriate for the R thread, but I think this may have more general relevance. I'm trying to decide on...

    Started by jpkelley‎, 08-22-2011 01:38 PM
    2 Pages
    1 2
    • Replies: 18
    • Views: 6,835
    08-23-2011, 11:37 AM Go to last post
  31. Expected Value of normally distributed random variables

    Given two independent random variables Y and W. Where Y is distributed as N(0,1) and W is distributed as N(0.100). a) Show that E = 1 and E = 0...

    Started by alias‎, 10-30-2011 12:01 PM
    2 Pages
    1 2
    • Replies: 18
    • Views: 9,763
    11-03-2011, 08:06 PM Go to last post
  32. Question Very long post - need help thanks

    Dear All, I am writing to you because I have got a lot of troubles with some concepts regarding Generalised Linear Models. I need to understand...

    Started by ZikO‎, 12-21-2011 11:56 AM
    2 Pages
    1 2
    glm, linear regression, link function, mle, pdf
    • Replies: 18
    • Views: 4,622
    12-28-2011, 05:41 PM Go to last post
  33. Simple stats question I cant wrap my head around.

    So this question relates the the Simple Risk Model which is (probability of risk event * probability of impact) * total loss = expected loss. L =...

    Started by qwerty‎, 02-18-2012 01:40 PM
    2 Pages
    1 2
    • Replies: 18
    • Views: 4,781
    02-19-2012, 10:05 PM Go to last post
  34. Smile test to use when comparing two un-even data sets, non-parametric?

    hi, i am working in a lab and need a bit of help. to simplify what we are doing, we test each patient's DNA for sequence X and sequence Y....

    Started by incubusfanclm‎, 07-09-2012 12:38 PM
    2 Pages
    1 2
    • Replies: 18
    • Views: 3,371
    07-10-2012, 06:45 AM Go to last post
  35. Chi test and regression

    Hello everybody I have to test whether there is a significant difference between two groups. I want to indicate that among the two groups are no...

    Started by Oli‎, 07-24-2012 01:10 PM
    2 Pages
    1 2
    • Replies: 18
    • Views: 3,385
    12-07-2012, 03:23 AM Go to last post
  36. Categorical and ordinal scale....chi square?

    Hi I am seeking help on this issue. I have a categorical variable namely gender (male x female) and an ordinal variable about perception of a...

    Started by Mohamed Afifi‎, 08-20-2012 04:12 PM
    2 Pages
    1 2
    • Replies: 18
    • Views: 11,070
    08-24-2012, 01:28 PM Go to last post
  37. effect size to report or not

    I challenged a prof today and I said that an effect size should not be reported for non significant results. He strongly disagreed. What are your...

    Started by trinker‎, 10-09-2012 12:32 PM
    2 Pages
    1 2
    effect size
    • Replies: 18
    • Views: 17,745
    10-10-2012, 03:15 PM Go to last post
  38. Study Design Question

    I have a study design question for you. I'm designing a study that will implement a bully prevention program into schools. The study will consist of...

    Started by beezer1983‎, 11-06-2012 11:40 AM
    2 Pages
    1 2
    • Replies: 18
    • Views: 3,074
    11-06-2012, 03:29 PM Go to last post
  39. Average

    Hi... I have an average rainfall,minimum and maximum temperature data.so can I find average value of this three variable?Is it meaningful? ...

    Started by Poonam‎, 02-20-2013 03:42 AM
    2 Pages
    1 2
    • Replies: 18
    • Views: 3,139
    02-21-2013, 02:25 AM Go to last post
  40. if else as publishable equation

    I'm camping but thinking about a score measure. I can write it as R code via:if(n > 0) {0} else {1} How would this be represented as an equation...

    Started by trinker‎, 08-08-2013 02:39 PM
    2 Pages
    1 2
    • Replies: 18
    • Views: 3,120
    10-11-2013, 10:38 PM Go to last post
  41. Removing outliers - endless story?

    I've been collecting some data for the first time, investigating differences between three groups of people and their numbers of hospital visits....

    Started by nilssonp386‎, 03-29-2015 04:06 PM
    2 Pages
    1 2
    outliers
    • Replies: 18
    • Views: 3,459
    05-08-2015, 08:24 AM Go to last post
  42. Urgent help please - Can I use spearmens rank? Simple Q!

    So I want to compare two variables and see whether there is a relationship (correlation). I've changed this slightly to my actual problem but the...

    Started by lionheartat20‎, 12-06-2015 06:04 PM
    2 Pages
    1 2
    • Replies: 18
    • Views: 2,984
    12-13-2015, 06:53 PM Go to last post
  43. Question Which book would you buy ?

    I found 2 books at Amazon.com. Both are about linear regression. Both have good overall ratings. Book A has the following ratings: 5 5 5 4 4 3 3...

    Started by martinl‎, 01-25-2016 06:22 PM
    2 Pages
    1 2
    • Replies: 18
    • Views: 4,188
    02-18-2016, 08:38 PM Go to last post
  44. Help with normal distribution

    Hello friends of the forum I have the following doubt ... If I have a sample of only 24 discrete data, how can I prove that these data follow a...

    Started by MrDavid‎, 02-02-2017 11:22 PM
    2 Pages
    1 2
    discrete data, kolmogorov-smirnov test, normal distribution, shapiro wilk, variables
    • Replies: 18
    • Views: 4,293
    02-06-2017, 11:16 PM Go to last post
  45. r and p in regression

    Hi John: I am still not clear about a regression graph. When r is 0.66 and p-value is 0.02, this is moderate to strong correlation and real,...

    Started by Susanbwh‎, 03-12-2006 12:55 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 4,014
    03-19-2006, 01:38 PM Go to last post
  46. Need major help in this statistics problem

    When looking at my text book. To answer the A, B, and C. at the bottom, we had to refer to our previous question in our book to help us with the...

    Started by sabbycat‎, 05-27-2008 10:09 AM
    2 Pages
    1 2
    • Replies: 17
    • Views: 25,471
    05-27-2008, 07:59 PM Go to last post
  47. Differences between 3 categories based on continuous and categorical predictors

    Hello, Hoping someone can point me in the right direction. I originally collected data for use in a paired logistic regression to determine...

    Started by biodude‎, 04-27-2009 01:18 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 5,958
    05-21-2009, 06:32 PM Go to last post
  48. sample proportion of a binomial distribution

    All, I am trying to figure out the probability (using a binomial distribution) that a sample proportion (4/100) will be greater than or equal to...

    Started by jbw9‎, 01-29-2010 11:50 AM
    2 Pages
    1 2
    • Replies: 17
    • Views: 10,309
    01-31-2010, 04:43 PM Go to last post
  49. Lightbulb Is Central Limit Theorm true for other statistics

    Dear friends, I have a question regarding Central Limit Theorem (CLT): Is Central Limit Theorm (CLT) true for other statistics such as variance,...

    Started by alireza‎, 09-14-2011 03:10 PM
    2 Pages
    1 2
    central limit theorm, other statistics
    • Replies: 17
    • Views: 6,951
    07-08-2012, 09:37 AM Go to last post
  50. Chi square? Is it the right test for this case?

    Hi all, I performed a simple experiment and I got a clear result. I need to know if there is a way to establish if this result is dued to the case...

    Started by frodo.jedi‎, 06-10-2010 07:35 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 6,858
    06-12-2010, 12:46 AM Go to last post
  51. Help, normal distribution-related problem

    Marks in a nationwide examination have a normal distribution with mean 53.4 & standard deviation of 8.8. It is decided to give an A grade to the best...

    Started by dEconomist‎, 02-24-2011 12:23 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 4,733
    03-07-2011, 10:36 AM Go to last post
  52. Help with a problem on confidence interval for means

    My homework problem is as follows: “The weight of salmon in two different rivers are normally distributed with mean μ1, μ2, respectively, and...

    Started by Okohme‎, 06-01-2011 02:58 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 4,238
    06-01-2011, 09:48 PM Go to last post
  53. Thumbs up Which test with multiple categories? (Newbie)

    Reposting since I got no response in the SAS forum. I'm a stats newbie. Let's say you want to document the amount of drug X used in 10...

    Started by StatsClue‎, 10-01-2011 10:19 AM
    2 Pages
    1 2
    • Replies: 17
    • Views: 4,717
    10-03-2011, 11:24 AM Go to last post
  54. Derive Expected Value of Yhat

    Yhat = 1/n Derive E(Yhat) and show that Var(Yhat) = ((1.25σ^2)/n) I don't know how to work with the constants to get the Expected Value and...

    Started by alias‎, 11-04-2011 12:54 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 8,397
    11-06-2011, 05:50 AM Go to last post
  55. 2IVs, multiple-levels; 1DV=frequency

    EDIT: (in title I meant 2 IVs, not 2DVs!) - I fixed it for you - Dason Hi, I have a question: what test would be appropriate? IV = genotype,...

    Started by Lucas Glover‎, 11-18-2011 12:52 PM
    2 Pages
    1 2
    2 iv, behavior, frequency, genotype
    • Replies: 17
    • Views: 4,396
    11-18-2011, 03:49 PM Go to last post
  56. Help!!!!!!! Comparing Two Distribution - Kolmogorov-Smirnov

    Hello, I am comparing two distributions by using the Kolmogorov-Smirnov method, but I want to know how different is one distribution to the other?...

    Started by Shamvir‎, 11-26-2011 11:18 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 10,864
    12-06-2011, 05:09 PM Go to last post
  57. multiple linear regression: negative Y ?!

    So I have my equation and it looks weird. The intercept is a small positive value and a lot of the co-efficients have large negative values. So that...

    Started by StatsClue‎, 02-21-2012 08:08 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 7,567
    02-22-2012, 01:27 PM Go to last post
  58. Standard Deviation Question

    Hey there. I am losing my mind with a standard deviation question!! "The length of scenes (in seconds) showing tobacco use were recorded for...

    Started by kelly g‎, 02-22-2012 09:04 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 3,556
    02-23-2012, 06:18 PM Go to last post
  59. Which type of regression should I use?

    Hi I would appreciate if anybody can tell me what model to use in the following design: Predicting the behavior by personal/occupational...

    Started by victorxstc‎, 02-29-2012 02:28 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 9,920
    03-04-2012, 01:21 PM Go to last post
  60. Problem Involving Moment Generating Functions

    Hi, I am working on this assignment and have no idea where to begin. I, however, am not asking for anyone to immediately provide an answer, as I...

    Started by S-C-3-1-3‎, 11-29-2012 03:06 AM
    2 Pages
    1 2
    • Replies: 17
    • Views: 3,025
    11-29-2012, 03:35 PM Go to last post

+ Post New Thread
Page 2 of 294 FirstFirst 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 52 102 ... LastLast

Thread Display Options

Use this control to limit the display of threads to those newer than the specified time frame.

Allows you to choose the data by which the thread list will be sorted.

Order threads in...

Note: when sorting by date, 'descending order' will show the newest results first.

Icon Legend

Contains unread posts
Contains unread posts
Contains no unread posts
Contains no unread posts
More than 15 replies or 300 views
Hot thread with unread posts
More than 15 replies or 300 views
Hot thread with no unread posts
Closed Thread
Thread is closed
Thread Contains a Message Written By You
You have posted in this thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts






Advertise on Talk Stats