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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 11:13 AM
    • Replies: 1
    • Views: 129,077
    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: 36,534
    09-30-2005, 09:44 AM Go to last post
  1. Inter-Rater Reliability - Question Combines Stats and SPSS Procedural Components

    Hello, I have a sample of 5,000 health assessments (with ratings from 1-5 on 7 dimensions that roll up to a composite score) completed on 1,400...

    Started by AnneS‎, Yesterday 04:16 PM
    • Replies: 2
    • Views: 63
    Today, 03:27 PM Go to last post
  2. Probability Problem

    there are two roads from A to B, and two roads from B to C.each of the four roads has independently probability 1/10 of being blocked by snow.What is...

    Started by osamastat‎, Today 12:21 PM
    • Replies: 1
    • Views: 36
    Today, 12:44 PM Go to last post
  3. Survey population rules

    Hi there! I'm new here so be gentle :) I have a specific problem to solve and I'm stuck, maybe I'm not asking the right questions, but I can't get...

    Started by codeline‎, Today 06:20 AM
    • Replies: 1
    • Views: 46
    Today, 07:19 AM Go to last post
  4. Identifying certain samples in a group

    My objective is to understand whether a manufactured item made with a modified process looks better than that same item made with a current process. ...

    Started by Dan Hall‎, Yesterday 12:13 PM
    • Replies: 0
    • Views: 57
    Yesterday, 12:13 PM Go to last post
  5. Technical term for "combination effect"

    Hello everybody, For the critics of my bachelor thesis I want to point out that my findings only apply for the used parameters and "combination...

    Started by Jacky867‎, Yesterday 03:28 AM
    • Replies: 1
    • Views: 65
    Yesterday, 07:07 AM Go to last post
  6. Chi square test where one variable is a constant

    Hello everyone, This is my first post on this forum. I am a newbie in this field and am trying hard to grasp the concepts of using statistical...

    Started by shaariq‎, 07-01-2016 01:22 AM
    • Replies: 9
    • Views: 467
    Yesterday, 06:18 AM Go to last post
  7. Comparison groups - how to test whether effect is stronger on one group than another?

    Hi guys, I would like to know whether a nominal variable (with four categories: credit-, debitcard, cash and neutral priming method) has a...

    Started by Goahead1‎, 07-25-2016 02:24 PM
    • Replies: 1
    • Views: 117
    07-26-2016, 02:53 AM Go to last post
  8. Use the moment-generating function to find the mean

    I have the moment-generating function for the discrete uniform distribution f(x)=\frac{1}{k} for x=1,2,...k: Mx(t)=\frac{e^t(1-e^t)}{k(1-e^t)} ...

    Started by Buckeye‎, 07-23-2016 07:50 PM
    • Replies: 3
    • Views: 194
    07-25-2016, 08:41 PM Go to last post
  9. Combining Standard Errors of 16 portfolios

    Hello everyone, I am working on Fama and French five factor model. I have run regression on 16 size- B/M excess portfolio returns on market...

    Started by Subhan Ahmad‎, 07-25-2016 03:31 PM
    regression coefficent, standard error
    • Replies: 0
    • Views: 86
    07-25-2016, 03:31 PM Go to last post
  10. Question Need a Proof for a Complicated Covariance equation

    Hi everyone I begin to study time series analysis from a short time , and i found this equation which author did not give a proof for it so...

    Started by sasha 99‎, 07-25-2016 12:54 PM
    • Replies: 1
    • Views: 82
    07-25-2016, 02:44 PM Go to last post
  11. Fitting a distribution to data using MLE

    I have a dataset to which I'd like to fit a distribution using MLE. In the old days, I would have taken a guess and then used a KS test to see if...

    Started by Kenabbott‎, 07-24-2016 12:08 PM
    fit distribution, gamlss, kolmagorov-smirnoff, mle
    • Replies: 4
    • Views: 151
    07-24-2016, 03:00 PM Go to last post
  12. FREE Statistics Help

    Hi! A list of books, tutorials, YouTube videos, chat forums, and online calculators is found at: http://www.ZeteticLibrary.com/help.htm ...

    Started by DrAnthonyRodriguez‎, 07-24-2016 09:32 AM
    free help
    • Replies: 0
    • Views: 105
    07-24-2016, 09:32 AM Go to last post
  13. T distribution

    1. True or False: For a t distribution with 12 degrees of freedom, the area between 2.6810 and 2.1788 is 0.970. 2. True or False: For a t...

    Started by Hasan‎, 07-23-2016 11:50 AM
    t distribution
    • Replies: 3
    • Views: 87
    07-24-2016, 08:02 AM Go to last post
  14. Combination

    You are at an ice cream shop that offers 9 different flavors of ice cream. A large ice cream cone comes with three scoops of ice cream. You can...

    Started by Hasan‎, 07-23-2016 11:48 AM
    • Replies: 6
    • Views: 117
    07-24-2016, 08:00 AM Go to last post
  15. Test Statistics

    A major swimming chain is considering opening a new store in an area that currently does not have any such stores. The chain will open if there is...

    Started by Hasan‎, 07-23-2016 11:46 AM
    hypotheis test, unrealistic
    • Replies: 4
    • Views: 101
    07-24-2016, 05:58 AM Go to last post
  16. Analysis

    The list of items that comprise the universe selected for analysis and is used in determining which items will be selected is called ________

    Started by Hasan‎, 07-23-2016 11:55 AM
    • Replies: 3
    • Views: 106
    07-24-2016, 02:25 AM Go to last post
  17. How to Interpret the Factor Analysis Findings

    Kindly help interpreting the Factor Analysis results as attached

    Started by Zainab‎, 07-23-2016 04:44 PM
    • Replies: 0
    • Views: 76
    07-23-2016, 04:44 PM Go to last post
  18. Sampling Techniques

    Which sampling techniques would be most appropriate if the researcher’s goal is to make statistical inferences from a sample to the population?

    Started by Hasan‎, 07-23-2016 11:52 AM
    • Replies: 3
    • Views: 73
    07-23-2016, 03:23 PM Go to last post
  19. Linear Regression

    A simple linear regression analysis resulted in b0 = 40 and b1 = 3. If one of the observations in your data set has a value of Y=14 and X=8, what...

    Started by Hasan‎, 07-23-2016 04:02 AM
    linear regression
    • Replies: 7
    • Views: 125
    07-23-2016, 03:13 PM Go to last post
  20. hypothesis test

    True or False: Referring to the table below, the null hypothesis will be rejected. TABLE An appliance manufacturer claims to have developed a...

    Started by Hasan‎, 07-23-2016 12:03 PM
    hypothesis test
    • Replies: 2
    • Views: 118
    07-23-2016, 02:57 PM Go to last post
  21. sampling method

    Mark wants to evaluate the GPAs of current NYU undergraduate students. He has received a list of all current students from the registrar and wants...

    Started by Hasan‎, 07-23-2016 12:00 PM
    • Replies: 5
    • Views: 89
    07-23-2016, 02:48 PM Go to last post
  22. Shape of Sampling Distribution

    What will happen to the shape of the sampling distribution of sample mean as the sample size of a random sample increases? Shape-wise. Thanks so...

    Started by lrobb‎, 07-23-2016 07:32 AM
    sampling distribution
    • Replies: 2
    • Views: 85
    07-23-2016, 10:57 AM Go to last post
  23. what type of statistical analysis would you apply?

    I am a teacher. I've done pre and post intervention testing with a group (n=17) of pupils. I also did the same tests with another group (n=17) who...

    Started by galegirly‎, 07-02-2016 11:34 AM
    analysis method, t-test two-sample
    • Replies: 6
    • Views: 406
    07-23-2016, 08:00 AM Go to last post
  24. Finding Standard Deviation of Sample Mean

    How do I find the standard deviation of the sample mean? A random sample size of 100 drawn from a population with mean 50 and standard deviation 10 ...

    Started by lrobb‎, 07-23-2016 07:29 AM
    standard deviation
    • Replies: 0
    • Views: 61
    07-23-2016, 07:29 AM Go to last post
  25. Finding the mean of a sample mean

    Just started this course. I am a 59 year old who is considering a major career change. Needed statistics (Intro) in order to take further Psychology...

    Started by lrobb‎, 07-22-2016 08:15 PM
    • Replies: 1
    • Views: 123
    07-22-2016, 09:39 PM Go to last post
  26. Best casual Barnes and Noble Statistics book for an adult (Not a pure textbook)

    Anyone know of a good "Barnes and Noble" caliber book for an adult to learn some basic stats concepts? Not a purely academic textbook. ...

    Started by CrunchAndSee‎, 07-22-2016 09:24 AM
    • Replies: 4
    • Views: 143
    07-22-2016, 10:53 AM Go to last post
  27. Post Please Validate the answers: Normal Distribution and Probability

    Question 1 a) Sales records over several years show that the number of Daily Telegraph newspapers sold by a Delhi newsagency on Saturdays follows a...

    Started by rajeevrc07‎, 07-18-2016 07:08 AM
    • Replies: 1
    • Views: 173
    07-22-2016, 09:55 AM Go to last post
  28. What follow-up tests for 3-way repeated measures ANOVA with no 3-way interaction?

    For a three-way repeated measures ANOVA: Do I use simple main effects syntax or just run t-tests in SPSS in my follow up analyses (pairwise...

    Started by Poppy1‎, 07-19-2016 09:11 PM
    post hoc tests, repeated measures anova, spss, three-way anova
    • Replies: 6
    • Views: 266
    07-22-2016, 09:10 AM Go to last post
  29. Which test to use for three categories of frequency data?

    I have three categories of data (no change, uplisted, down listed). For each category I have a value for the frequency of occurrence. How do I...

    Started by Ernestine‎, 07-22-2016 06:49 AM
    anova, chi square, frequency, frequency data, post hoc tests
    • Replies: 0
    • Views: 74
    07-22-2016, 06:49 AM Go to last post
  30. Binomial distribution with different success probabilities

    I have n independent trials with different success probabilities θi for i=1 to i=n I want to show that... μ=nθ with θ= (1/n) ∑θi for i=1 to i=n ...

    Started by Buckeye‎, 07-20-2016 11:56 PM
    • Replies: 3
    • Views: 192
    07-21-2016, 03:55 PM Go to last post
  31. Financial Data Classification System

    Hello I am looking at financial data (Revenue for Example) over a 5-10 year time frame and want to classify the data based on trends observed. Am...

    Started by Stockcalc‎, 07-21-2016 10:46 AM
    classification, financial modeling, linear regression
    • Replies: 0
    • Views: 116
    07-21-2016, 10:46 AM Go to last post
  32. Cohen's d question

    Is it possible to have a Cohen's d result of -5.146, or do I need to work on my math?:o

    Started by steya‎, 07-20-2016 11:52 PM
    • Replies: 0
    • Views: 109
    07-20-2016, 11:52 PM Go to last post
  33. Wink How to write up results of a Quantile Regression

    Hi, I'm trying to write up the results of my Quantile Regression but cannot find any guidance of this anywhere. Can anyone help? Thanks

    Started by VickyH‎, 07-19-2016 02:04 PM
    quantile regression
    • Replies: 2
    • Views: 176
    07-20-2016, 01:53 PM Go to last post
  34. Kappa SPSS

    Hello All, Thank you in advance if you are able to provide some information on my question. I am attempting to run Cohen's kappa for inter-rater...

    Started by derekcruise‎, 07-16-2016 06:11 PM
    kappa, multiple variables, spss
    • Replies: 1
    • Views: 159
    07-20-2016, 12:40 PM Go to last post
  35. A statistic question.

    Provider Charge(Total) Fraud %Fraud Fraud*%Fraud A §§§§§§§1000§§§§§§§600§§§§§0.6§§§§§§360 B §§§§§§§100§§§§§§§§70§§§§§§0.7§§§§§§49 C...

    Started by SASMATH‎, 07-19-2016 08:55 PM
    expectation, modeling, sas, statisics, weighted
    • Replies: 0
    • Views: 160
    07-19-2016, 08:55 PM Go to last post
  36. Shifting Variable SPSS

    Hello, Does anyone know how to conduct a shift transformation in SPSS? Specifically, I want to test effect of a genotype on an alcohol...

    Started by jessid09‎, 07-18-2016 11:32 AM
    • Replies: 1
    • Views: 157
    07-18-2016, 02:14 PM Go to last post
  37. Conditional logit: what to use a dv?

    I have a question about a conditional logit model that I want to use to see how characteristics of various possible destination countries affect...

    Started by petra‎, 07-18-2016 05:00 AM
    • Replies: 0
    • Views: 107
    07-18-2016, 05:00 AM Go to last post
  38. weighted variance very short question

    Hi there, I am interested in the asymptotic variance of the weighted sample mean and weighted sample variance. weighted_mean=sum(w(i)x(i)) if...

    Started by leo nidas‎, 07-18-2016 01:13 AM
    weighted mean, weighted variance
    • Replies: 0
    • Views: 106
    07-18-2016, 01:13 AM Go to last post
  39. No academic support with my dissertation :( - statistical analysis

    I've tried posting this in r/Ask statistics - but the replies are too technical so far. I really don't know what I'm doing. I am reading a lot on the...

    Started by fr236‎, 07-13-2016 06:10 AM
    • Replies: 1
    • Views: 286
    07-17-2016, 04:03 PM Go to last post
  40. Standardizing logistic regression betas in NHANES

    Hi everyone, New user here. I have a logistic regression problem in which I need to compare beta weights across variables in the analysis. I am...

    Started by jhunterunc‎, 07-17-2016 01:45 PM
    logistic regression, nhanes, standardization
    • Replies: 0
    • Views: 146
    07-17-2016, 01:45 PM Go to last post
  41. Question Comparing 2 shops - based on Prices

    Dear all, I have a problem here: suppose I wish to compare 2 electronic gadget shops, I want to know which shop's prices are lower in general. ...

    Started by martinl‎, 06-14-2016 08:51 AM
    • Replies: 3
    • Views: 479
    07-17-2016, 10:15 AM Go to last post
  42. Meta-Analyis (Hedges & Olkin) - Averaging the raw correlation or averaging fishers-z?

    Hello all, I am working on a meta-analyis and according to the book of Borenstein (2009), when a study reports more than one outcome (i.e. Return...

    Started by Feal‎, 07-16-2016 06:09 AM
    • Replies: 2
    • Views: 174
    07-17-2016, 06:52 AM Go to last post
  43. Relating variation of one data set to mean of another set?

    Hello all. This isn't homework, but its been a few years since my stats class. I'm willing to do some legwork, I just can't remember enough to get...

    Started by Rakurai‎, 07-16-2016 10:25 AM
    • Replies: 1
    • Views: 162
    07-16-2016, 11:42 PM Go to last post
  44. Power calculation

    Hi Guys, really need your help please. My supervisor has advised that I perform a power calculation. I performed a re-audit ie in 2008/09 there...

    Started by skaur‎, 04-03-2016 11:40 AM
    2 Pages
    1 2
    • Replies: 15
    • Views: 796
    07-16-2016, 11:31 AM Go to last post
  45. Can a post-hoc power analysis be done?

    Hi Guys, Just wondering if anyone could help please. For the following data I don't think a post-hoc power analysis can be done? In 2014 the...

    Started by skaur‎, 07-09-2016 08:53 AM
    • Replies: 2
    • Views: 287
    07-15-2016, 09:47 AM Go to last post
  46. Data restructuring

    Hi all I am trying to restructure my data and any help will be really appreciated. I have no preferences regarding which software to use In the...

    Started by wadder‎, 07-15-2016 06:24 AM
    • Replies: 0
    • Views: 170
    07-15-2016, 06:24 AM Go to last post
  47. Smile which test to use for comparing samples with single observation???

    Hello! I am testing percent genotoxicity of water samples using a bioassay which is expensive to perform and therefore cannot have replicates. Each...

    Started by sk2‎, 06-23-2016 12:24 AM
    • Replies: 4
    • Views: 626
    07-14-2016, 05:21 PM Go to last post
  48. Probability of more than 5 responses surveying two locations with different response

    You are looking for people between 16 to 23 years to answer a survey. Assume houses on First Street, based on copious amounts of empty beer bottles...

    Started by marcusdaz‎, 07-14-2016 10:13 AM
    probability, statistics
    • Replies: 0
    • Views: 210
    07-14-2016, 10:13 AM Go to last post
  49. Is a independant sample t-test the right test here?

    Hi everybody, I'm really new on this topic of statistical testing and I hope to find some help here.:wave: I was trying to figure out which...

    Started by tesarolle‎, 07-13-2016 02:29 AM
    t-test; mean;
    • Replies: 5
    • Views: 305
    07-14-2016, 06:36 AM Go to last post
  50. Question Please help with the forecast using week days data

    Hi everyone, Can someone please help with the forecast in Excel? Based on past 7 days of data, is it possible to forecast next 19 days? As you...

    Started by Dylan10M‎, 07-13-2016 05:46 PM
    • Replies: 1
    • Views: 187
    07-14-2016, 02:52 AM Go to last post
  51. Confidence Interval and Statistical Advantage

    I'm more of a programmer, so perhaps my confusion is OK. I have 66 subjects, testing 8 products, (a different one each visit.) I'm doing...

    Started by LordChallen‎, 07-13-2016 03:49 PM
    • Replies: 0
    • Views: 204
    07-13-2016, 03:49 PM Go to last post
  52. Which value do I use for Content Analysis after intercoder agreement is satisfactory

    Hi I have 2 raters for content analysis and have a satisfactory score for Cohen's Kappa (0.805). Can I use either raters' values for analysis or...

    Started by MazOz‎, 07-12-2016 10:22 PM
    cohen's kappa, content analysis
    • Replies: 0
    • Views: 153
    07-12-2016, 10:22 PM Go to last post
  53. Generating confidence intervals for both height and weight with the same sample?

    Given that height and weight tend to be correlated, would it be okay for me to use a single simple random sample of people to create confidence...

    Started by downthesun01‎, 07-12-2016 05:01 PM
    confidence interval, correlation, sampling
    • Replies: 3
    • Views: 226
    07-12-2016, 08:37 PM Go to last post
  54. Philosophic\mathematic question

    Hii all, i need help with a question that i have to solve during statistics methods for mechanical engineering course: A.Suppose you need to choose...

    Started by avielwrx‎, 07-11-2016 04:04 AM
    • Replies: 4
    • Views: 242
    07-12-2016, 04:08 PM Go to last post
  55. I need help with this problem!

    First of all thanks to anyone who helps, I am so lost! Here is my question My teacher had us toss hearsey kisses 5 times and count how many...

    Started by ineedhelpwiththis‎, 07-12-2016 12:24 PM
    • Replies: 1
    • Views: 169
    07-12-2016, 12:26 PM Go to last post
  56. Repeated measures ANOVA

    Hello everyone, I am conducting a randomized crossover study, in which patients are administered placebo and active drug in a random order on two...

    Started by studmac91‎, 07-12-2016 12:25 PM
    • Replies: 0
    • Views: 160
    07-12-2016, 12:25 PM Go to last post
  57. Probability Distribution

    Suppose it is known that 8% of males are colour blind. In a random sample of 500 males, what is the approximate probability that at least 10% of...

    Started by Saad‎, 07-11-2016 06:49 PM
    proability, statistic
    • Replies: 1
    • Views: 201
    07-12-2016, 09:00 AM Go to last post
  58. Rater's review of a medical resuscitation - stats question related to research Q

    Hello all, thank you for taking the time to visit my post. First, I will state outright that I have very limited knowledge in statistics and...

    Started by mikeassaad‎, 07-11-2016 02:56 PM
    • Replies: 0
    • Views: 174
    07-11-2016, 02:56 PM Go to last post
  59. Testing Simple Effects for Generalized Linear Regression

    Hello, I have found significant interaction effects when analyzing a negative binomial generalized linear regression model. However, I am not...

    Started by jessid09‎, 07-10-2016 10:08 PM
    interaction, regression, simple effects
    • Replies: 6
    • Views: 292
    07-11-2016, 02:09 PM Go to last post
  60. Prediction model for gentrification process

    I am looking for a way to design a model, which can in some way predict a gentrification process. I am using various indicators such as age...

    Started by Bennipulle‎, 07-11-2016 12:10 PM
    • Replies: 0
    • Views: 140
    07-11-2016, 12:10 PM Go to last post

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