1. Announcement:
    Want access to a chatbox?
    Dason ‎(Devorador de queso)
    05-10-2017
    Views:
    1,917
+ Post New Thread
Page 4 of 294 FirstFirst 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 54 104 ... LastLast
Threads 181 to 240 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: 197,184
    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: 66,970
    09-30-2005, 09:44 AM Go to last post
  1. Normal Distribution Question

    Need Help!!! Here is the problem: The National Center for Educational Statistics report that in the year ending 2003 some 400,000 students took...

    Started by latonya1‎, 06-16-2007 03:57 PM
    • Replies: 14
    • Views: 4,042
    06-19-2007, 08:38 PM Go to last post
  2. Help with Log Transformation

    Looking at my results, they do not fit the normal distribution curve. Therefore I was advised to do a 'log transformation' of the data. Is there...

    Started by naturalgut‎, 04-07-2008 07:36 AM
    • Replies: 14
    • Views: 23,936
    07-31-2014, 07:21 AM Go to last post
  3. Probability (i think quite hard) question...any hints?

    Have you any ideas on how to solve this problem? I don't know how to start! At least some hints to begin with...thanx 2 students can solve...

    Started by blackjesus13‎, 10-24-2008 01:52 PM
    • Replies: 14
    • Views: 3,866
    10-25-2008, 10:46 AM Go to last post
  4. Tricky question...can you solve it?

    I have a sample about the number of essays of politics received on time in each of the first 8 weeks. Sample mean=8. Sample variance=2. Then I have...

    Started by blackjesus13‎, 10-30-2008 12:56 PM
    • Replies: 14
    • Views: 3,389
    11-03-2008, 12:20 PM Go to last post
  5. Exponential smoothing

    Hello guys, im a uni student and have been put on a module that has alot of maths in it and ive never done maths in any other modules so im looking...

    Started by richtheman87‎, 11-11-2008 10:20 AM
    • Replies: 14
    • Views: 5,211
    11-14-2008, 06:52 AM Go to last post
  6. normal distribution?

    Hi, Could someone please shed his/her light on my 'problem'? When I looked at the frequency histogram of my data, it looked pretty normal to me...

    Started by lucassio‎, 01-17-2009 04:25 AM
    • Replies: 14
    • Views: 3,456
    01-20-2009, 01:41 AM Go to last post
  7. help please: issues with test selection and interpretation of results

    Hello I've got what is hopefully a simple problem which I would really appreciate some guidance and advice on: my data is in the form of...

    Started by amber33‎, 01-28-2009 09:21 PM
    • Replies: 14
    • Views: 6,085
    02-04-2009, 01:14 AM Go to last post
  8. Comparing sample with normative data

    Problem: I will have survey results for a largish sample (n>300) and want to compare how different their scores are to established norms. The norms...

    Started by mrg‎, 07-06-2009 05:30 PM
    • Replies: 14
    • Views: 16,059
    07-17-2009, 04:10 AM Go to last post
  9. correlation between 2 groups

    Hi I have given questionnaires to 50 participants, and i want to see if there are any differences in the mean values between those participants...

    Started by safig‎, 11-07-2009 04:46 AM
    • Replies: 14
    • Views: 9,857
    11-09-2009, 12:26 PM Go to last post
  10. Correlation with a nominal variable?

    Hello, I'm conducting a research project where I'm trying to find the correlation between the LSI-R total score (survey) and recidivism (if the...

    Started by laddergoat‎, 05-19-2010 11:08 AM
    • Replies: 14
    • Views: 32,337
    01-21-2015, 08:43 AM Go to last post
  11. independent samples t test help

    i have 3 variables male female total and i have the number of deaths per month in each variable i want to make an independent samples t test...

    Started by jak22‎, 05-25-2010 11:16 AM
    • Replies: 14
    • Views: 6,251
    05-27-2010, 02:47 AM Go to last post
  12. ANCOVA violating homoscedasticity

    I've come across a problem in ANCOVA that I can't seem to figure out. I have a sample size of over 600 people. I've got a 2 (male vs female) x 3...

    Started by dfedele84‎, 10-19-2010 10:30 PM
    • Replies: 14
    • Views: 11,372
    02-20-2011, 11:56 AM Go to last post
  13. Large sample size - not normally distributed - what now?

    Hello Everyone, I'm looking to get some advice on what statistical method is most appropriate for the question I'm trying to answer - if I even...

    Started by SuzanneMonette‎, 10-25-2010 09:44 AM
    • Replies: 14
    • Views: 12,236
    10-26-2010, 02:18 PM Go to last post
  14. importing csv files into R

    Hi I keep trying to import a csv file into R but keep getting the error "S", please can anyone tell me what I am doing wrong

    Started by niyinks‎, 11-28-2010 07:34 AM
    • Replies: 14
    • Views: 12,442
    06-02-2013, 05:16 PM Go to last post
  15. High and Low level of achievement

    Hi In an achievement test, i want to divide the samples into a group of high and low achievers. My subordinate suggested the formula of M-1S for...

    Started by rockyallen7771‎, 01-03-2011 04:48 AM
    • Replies: 14
    • Views: 3,263
    01-03-2011, 05:08 PM Go to last post
  16. Likelihood Likert Scale, No of Items?

    Hello everyone, i am creating a survey and there will be a certain question such as "Would you suggest this to the others?" Obviously i could...

    Started by micdhack‎, 08-21-2011 02:16 PM
    • Replies: 14
    • Views: 9,144
    08-23-2011, 04:32 PM Go to last post
  17. correlation between binomial and continue variables

    Hi all, I d like know if exist some method for run a correlation between 2 variables: one continue (and normal variate) and other binomial...

    Started by Rodrigo Badilla Cabrera‎, 09-28-2011 12:08 PM
    • Replies: 14
    • Views: 2,357
    09-30-2011, 12:30 PM Go to last post
  18. Question Should degrees of freedom be explained?

    I've always been dissatisfied with the "explanations" of degrees of freedom presented in statistics courses. These explanations either rely on...

    Started by checolt‎, 10-02-2011 07:45 PM
    degrees of freedom
    • Replies: 14
    • Views: 5,521
    10-03-2011, 11:56 PM Go to last post
  19. Calculating alpha and power

    A box contains 20 balls, some red and some black. We want to test the hypotheses: Null: there are exactly 4 red balls in the box. Alternative:...

    Started by drippydrop22‎, 10-08-2011 03:53 PM
    • Replies: 14
    • Views: 16,291
    10-09-2011, 03:47 PM Go to last post
  20. Simple(I think) Chi Square question and my proposed solution.

    Not very confident with stats so just wanted some reassurance that Im doing the Right Thing with the question Ive been set here. A survey of 60...

    Started by Scrutiniser‎, 12-11-2011 09:49 AM
    • Replies: 14
    • Views: 3,590
    12-11-2011, 04:33 PM Go to last post
  21. STATISTICAL INFERENCE ; Effect SIZE & Power Question

    Hello everyone!:wave: I'm having trouble solving the below stats question. If anyone can show me tips, I would really appreciate it. You are...

    Started by elia1987‎, 12-11-2011 04:56 PM
    • Replies: 14
    • Views: 5,400
    12-20-2011, 02:54 AM Go to last post
  22. XTLOGIT - interpreting odds ratio. Am I on the right track??????

    I ran an xtlogit model on my panel data. Dependent variable: whether ppl adhere to the program or not (0 do not adhere 1 adhere) Independent...

    Started by berry16‎, 01-05-2012 12:52 AM
    • Replies: 14
    • Views: 16,222
    01-08-2012, 06:20 PM Go to last post
  23. Exam Question (flawed?)

    Hi, I'm new here... I work in a school in Ireland, where a new Maths course (called Project Maths) has just been introduced for the Leaving Cert...

    Started by XLcProject‎, 01-10-2012 05:58 AM
    • Replies: 14
    • Views: 3,002
    01-11-2012, 10:47 AM Go to last post
  24. Coorelation

    Hi all, I am new to statistics..and this could be a simple question. I have a data that has around 5000 rows...each row is a variable, and I have...

    Started by Jordan‎, 01-17-2012 02:19 PM
    • Replies: 14
    • Views: 2,050
    01-20-2012, 10:24 PM Go to last post
  25. Effect size

    I have difficulty to calculate the effect size and how to interpret the results. I wonder if you could help me, I am really stuck on this point :((...

    Started by pineapple66‎, 03-03-2012 02:27 AM
    • Replies: 14
    • Views: 4,091
    03-04-2012, 10:14 AM Go to last post
  26. Project - t-test vs. anova

    Hi guys, I'm doing a project looking at elaborative communication in teachers. I have 2 IV's - 'Talk' conditions: IV1 = elaborative techniques...

    Started by shellz‎, 03-16-2012 04:25 AM
    • Replies: 14
    • Views: 2,591
    03-18-2012, 11:36 PM Go to last post
  27. Data transformation

    Hello I am asking about data transformation attempting to normalize it. How can I decide which transformation to use? I read that the curve...

    Started by Mohamed Afifi‎, 04-17-2012 10:04 AM
    • Replies: 14
    • Views: 2,813
    04-18-2012, 11:25 AM Go to last post
  28. [SOLVED] SE on count data?

    I recently created a bar graph in ggplot2 and noticed in the help file Hadley Wickham has what appears to be a count data set with standard errors...

    Started by trinker‎, 04-28-2012 12:13 AM
    • Replies: 14
    • Views: 7,236
    05-19-2012, 08:02 PM Go to last post
  29. why is this a right tail? [Hypothesis Testing]

    THE QUESTION: what makes this decide that this is a right tail, is there a keyword ?

    Started by cutflow‎, 05-30-2012 10:08 AM
    • Replies: 14
    • Views: 6,219
    05-30-2012, 08:31 PM Go to last post
  30. How do I Construct a 95% confidence interval (C.I.) with this formula?

    Hi, Im hoping someone can help do this for me. Construct a 95% confidence interval (Using the following formula: 95% C.I. Equals "mean +/-...

    Started by pcrcool‎, 07-19-2014 05:09 PM
    • Replies: 14
    • Views: 2,984
    07-20-2014, 04:42 AM Go to last post
  31. Fisher's Exact Test for determining correlation between variables

    Hello all, My P.I. has presented me with a 2x2 contingency table and asked me to perform Fisher's Exact Test to determine whether a correlation...

    Started by Omega Glory‎, 09-02-2012 01:07 AM
    • Replies: 14
    • Views: 14,697
    09-24-2012, 11:52 AM Go to last post
  32. Independent Binomial random variables, MLE of px and py

    Let X and Y be independent Binomial random where X~B(Nx, px) and Y~B(Ny,py), where Nx and Ny are known and px and py are unknown. (a) Suppose...

    Started by sexykitten69‎, 12-09-2012 08:55 PM
    • Replies: 14
    • Views: 2,472
    12-10-2012, 10:28 PM Go to last post
  33. suggest suitable Statistical test

    Very simple problem... There is a store where 100 people visit, 52 are males and 48 are females, so the proportion is 0.52 and 0.48 respectively Is...

    Started by chetan.apa‎, 01-25-2013 09:23 AM
    • Replies: 14
    • Views: 2,225
    01-31-2013, 08:08 AM Go to last post
  34. What kind of distribution is that?

    Suppose, you have a register with, say, 30 cells. Each cell might be 0 (probability p = 0.95) or 1 (probability q = 1-p = 0.05). The register has a...

    Started by Usaty‎, 01-27-2013 09:50 AM
    • Replies: 14
    • Views: 1,670
    01-27-2013, 11:21 PM Go to last post
  35. Please help! Which test..reward!!

    my dissertation is in tomorrow and i really need to know which statistical test to run on my study. I will internet bank 15 to anyone who can...

    Started by HELP123‎, 04-30-2013 09:54 AM
    • Replies: 14
    • Views: 1,786
    04-30-2013, 02:14 PM Go to last post
  36. Calculating my percentile score - it just seems too high!

    I recently completed an exam and received my scores. I wanted to find out my percentile. I got a total of 317.5 out of a total score of 500. I...

    Started by supernaut76‎, 05-19-2013 01:15 AM
    rescale
    • Replies: 14
    • Views: 1,994
    05-29-2013, 01:39 PM Go to last post
  37. Very General - Simple Statistics Question

    This is a general question i have. **** FULL QUESTION **** Problem: Lexico specializes in the manufacture of coated cables. (Do a Google search...

    Started by mikey32230‎, 09-28-2013 02:04 PM
    • Replies: 14
    • Views: 4,059
    10-04-2013, 01:55 PM Go to last post
  38. Exclamation Statistical analysis, is this even possible?

    Hello, Firstly thank you if you are willing to help; I am carrying out an experiment for my Alevels (England). My school does not know how to...

    Started by p_williams72‎, 03-11-2014 01:34 PM
    • Replies: 14
    • Views: 2,254
    03-12-2014, 03:22 PM Go to last post
  39. Maximum Likelihood Estimator(MLE) for P

    Q: Suppose we have a coin for which the probability that it lands on heads is p where p equals either 0.4 or 0.7, but we do not know which of these...

    Started by crookedhorizon‎, 03-09-2014 10:44 AM
    mle
    • Replies: 14
    • Views: 1,980
    03-09-2014, 12:57 PM Go to last post
  40. Talking confidence interval interpretation -please help

    how do i interpret a 95% confidence interval which is presented in percentages with no standard deviations. (this is for a medical essay) two...

    Started by soph‎, 03-20-2014 08:58 AM
    • Replies: 14
    • Views: 2,016
    03-21-2014, 03:18 AM Go to last post
  41. How to average coefficients' standard errors?

    Hi, I'm considering a "mean-group"-estimator, where the estimated coefficients are unweighted means of multiple regressions from different groups....

    Started by ladf‎, 04-03-2014 01:21 PM
    • Replies: 14
    • Views: 2,859
    04-07-2014, 02:56 PM Go to last post
  42. Question Normal distribution

    Should the independent variables be normally distributed to run multiple linear regression in Stata?

    Started by mariamoskvina‎, 04-24-2014 05:03 AM
    • Replies: 14
    • Views: 2,810
    04-25-2014, 09:51 AM Go to last post
  43. MLE for X ~ Exp(λ)

    Let (X1, ... Xn) be a random sample from a random variable. Find the maximum likelihood estimator for λ. I know the answer to this but do you...

    Started by StatsBeginner‎, 07-21-2014 11:06 AM
    maximum likelihood
    • Replies: 14
    • Views: 13,167
    07-22-2014, 07:13 AM Go to last post
  44. Comparing data from multiple samples - which model?

    Hello My job is to measure electrical characteristics of transistors e.g. onset voltage or threshold voltage. Every wafer I test has roughly 4000...

    Started by pete900‎, 10-14-2014 08:56 AM
    • Replies: 14
    • Views: 3,142
    01-29-2015, 11:36 AM Go to last post
  45. Please please please help me

    Hi, I'm really hoping that someone on here can help me. I'm sure this is going to be something ridiculously simple for someone but I am struggling...

    Started by nickauger‎, 10-27-2014 03:04 PM
    please help
    • Replies: 14
    • Views: 2,177
    10-28-2014, 08:00 AM Go to last post
  46. Target Distribution

    Hello, This is my first post. I'm a elementary math teacher who likes to look at scores to find some deeper truth about mine and my students'...

    Started by jsraadt‎, 12-14-2014 05:02 PM
    • Replies: 14
    • Views: 2,082
    12-16-2014, 07:41 AM Go to last post
  47. Post Continuous or categorical variable

    Hi guys, I'm currently enrolled in a medical statistics course and I'd like some help with a problem I'm facing. I have a dataset that contains...

    Started by MaxTalksStats‎, 01-23-2015 10:26 AM
    • Replies: 14
    • Views: 2,218
    01-23-2015, 06:02 PM Go to last post
  48. Logistics Regression

    Hi, I've conducted a binary logistics regression in SPSS and I'm having trouble interpreting the results. Bear in mind that I'm a stats novice and...

    Started by monkeyspearfish‎, 08-04-2015 06:22 PM
    • Replies: 14
    • Views: 2,667
    08-07-2015, 03:02 PM Go to last post
  49. Analysis for non mutually exclusive Categorical data

    I have 5 variables Y, A, B, C & D (4 are independent and 1 is dependent). Four variables (3 independent - A, B, C & D and 1 dependent - Y) are...

    Started by Mosima‎, 09-17-2015 08:19 AM
    • Replies: 14
    • Views: 2,477
    09-24-2015, 02:01 PM Go to last post
  50. PCA or clustering on binary data?

    Hello, I have a dataset consisting of around 30 species of plants (rows) and around 50 variables (my columns) that are medicinal properties of...

    Started by jk78‎, 10-06-2015 05:55 AM
    binary data, pca, principal component
    • Replies: 14
    • Views: 3,192
    10-15-2015, 10:55 AM Go to last post
  51. Does a pill cause more weight loss than a placebo?

    Let's say I want to know whether a certain weight loss pill works. I have before and after weights of 15 people who took the pill and 20 people who...

    Started by efoss‎, 08-19-2016 12:01 PM
    • Replies: 14
    • Views: 1,823
    08-22-2016, 09:59 AM Go to last post
  52. Simulating a logistic regressio - scary results

    Hi, I tried to work out the necessary sample size for a logistic regression by simulations and got some scary results. If anyone could check the...

    Started by rogojel‎, 05-26-2017 03:41 AM
    • Replies: 14
    • Views: 1,776
    05-29-2017, 04:11 PM Go to last post
  53. Factor analysis

    Is anyone an expert on factor analysis?

    Started by Susanbwh‎, 02-08-2006 01:58 PM
    • Replies: 13
    • Views: 4,403
    02-10-2006, 09:17 AM Go to last post
  54. ANOVA, assumptions mandatory?

    So on numerous websites, which of course we can trust completely ;) I've run across arguments that the normality and homogeneity assumptions for...

    Started by jawon‎, 09-03-2008 02:29 PM
    • Replies: 13
    • Views: 10,395
    09-12-2008, 07:44 AM Go to last post
  55. significant interaction but non significant simple effects?

    Hello everyone, I conducted a 2x2 mixed design ANOVA. The between subjects factor was group (high vs. low), and the within subjects factor was...

    Started by spiral‎, 09-25-2008 12:21 AM
    • Replies: 13
    • Views: 36,428
    05-03-2010, 08:27 AM Go to last post
  56. Question Independent or Depedent T Test?

    I am struggling with this question and I was wondering if anyone can offer any insight? Lets say a fisheries biologist wants to know if a new...

    Started by Sunshine1987‎, 10-17-2008 11:31 PM
    • Replies: 13
    • Views: 4,390
    10-18-2008, 11:52 PM Go to last post
  57. Help with HLM

    Can anybody help me by telling whether the following data IS suitable form HLM? Variable 1: Three regions (of the world) Variable 2: Several...

    Started by Philyuko‎, 11-10-2008 02:37 PM
    • Replies: 13
    • Views: 4,433
    11-15-2008, 10:12 AM Go to last post
  58. Rao-Blackwell Theorem

    I was reading this theorem again and again, but I really don't understand the meaning of "for all theta" in this theorem (circled in red). I thought...

    Started by kingwinner‎, 01-22-2009 05:46 AM
    • Replies: 13
    • Views: 4,864
    02-01-2009, 02:27 PM Go to last post
  59. What test should I consider?

    Hello everyone. Very interesting forum although a bit deep for a stats-noob like myself. I have a question, any help you can give would be...

    Started by TheEyeRoller‎, 12-06-2009 11:27 AM
    • Replies: 13
    • Views: 4,355
    12-16-2009, 03:59 PM Go to last post
  60. Why aren't my results significant?

    I'm carrying out an n-way Anova in SPSS. The dependent variable is salary and one of the independent variables is level of English. The Anova is...

    Started by minnie2‎, 03-21-2010 04:25 PM
    • Replies: 13
    • Views: 4,552
    03-22-2010, 07:56 PM Go to last post

+ Post New Thread
Page 4 of 294 FirstFirst 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 54 104 ... 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