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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 12:13 PM
    • Replies: 1
    • Views: 200,091
    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: 68,408
    09-30-2005, 09:44 AM Go to last post
  1. 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
    analysis
    • Replies: 3
    • Views: 1,509
    07-24-2016, 02:25 AM Go to last post
  2. 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: 1,510
    07-23-2016, 04:44 PM Go to last post
  3. 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
    sampling
    • Replies: 3
    • Views: 1,484
    07-23-2016, 03:23 PM Go to last post
  4. 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: 1,850
    07-23-2016, 03:13 PM Go to last post
  5. 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: 3,089
    07-23-2016, 02:57 PM Go to last post
  6. 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
    sampling
    • Replies: 5
    • Views: 2,350
    07-23-2016, 02:48 PM Go to last post
  7. 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: 1,686
    07-23-2016, 10:57 AM Go to last post
  8. 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: 2,274
    07-23-2016, 08:00 AM Go to last post
  9. 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: 1,128
    07-23-2016, 07:29 AM Go to last post
  10. 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: 1,312
    07-22-2016, 09:39 PM Go to last post
  11. 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: 2,340
    07-22-2016, 10:53 AM Go to last post
  12. 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: 1,435
    07-22-2016, 09:55 AM Go to last post
  13. 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: 3,439
    07-22-2016, 09:10 AM Go to last post
  14. 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: 1,201
    07-22-2016, 06:49 AM Go to last post
  15. 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: 1,981
    07-21-2016, 03:55 PM Go to last post
  16. 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: 1,173
    07-21-2016, 10:46 AM Go to last post
  17. 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: 686
    07-20-2016, 11:52 PM Go to last post
  18. 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: 2,062
    07-20-2016, 01:53 PM Go to last post
  19. 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: 2,738
    07-20-2016, 12:40 PM Go to last post
  20. 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: 1,055
    07-19-2016, 08:55 PM Go to last post
  21. 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: 1,120
    07-18-2016, 02:14 PM Go to last post
  22. 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: 692
    07-18-2016, 05:00 AM Go to last post
  23. 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: 960
    07-18-2016, 01:13 AM Go to last post
  24. 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: 880
    07-17-2016, 04:03 PM Go to last post
  25. 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: 1,154
    07-17-2016, 01:45 PM Go to last post
  26. 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: 1,732
    07-17-2016, 10:15 AM Go to last post
  27. 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: 1,702
    07-17-2016, 06:52 AM Go to last post
  28. 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: 1,051
    07-16-2016, 11:42 PM Go to last post
  29. 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: 3,251
    07-16-2016, 11:31 AM Go to last post
  30. 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: 1,794
    07-15-2016, 09:47 AM Go to last post
  31. 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: 1,233
    07-15-2016, 06:24 AM Go to last post
  32. 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: 2,485
    07-14-2016, 05:21 PM Go to last post
  33. 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: 1,295
    07-14-2016, 10:13 AM Go to last post
  34. 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: 1,668
    07-14-2016, 06:36 AM Go to last post
  35. 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: 1,232
    07-14-2016, 02:52 AM Go to last post
  36. 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: 1,001
    07-13-2016, 03:49 PM Go to last post
  37. 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: 897
    07-12-2016, 10:22 PM Go to last post
  38. 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: 1,594
    07-12-2016, 08:37 PM Go to last post
  39. 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: 1,233
    07-12-2016, 04:08 PM Go to last post
  40. 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: 1,461
    07-12-2016, 12:26 PM Go to last post
  41. 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: 1,198
    07-12-2016, 12:25 PM Go to last post
  42. 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: 1,385
    07-12-2016, 09:00 AM Go to last post
  43. 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: 1,004
    07-11-2016, 02:56 PM Go to last post
  44. 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: 1,536
    07-11-2016, 02:09 PM Go to last post
  45. 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: 1,197
    07-11-2016, 12:10 PM Go to last post
  46. Power of Chi square

    Hi Guy Just wondering if anyone can check if the following calculation is correct please and the right formula has been used? Have posted elsewhere...

    Started by skaur‎, 07-10-2016 12:23 PM
    • Replies: 0
    • Views: 1,624
    07-10-2016, 12:23 PM Go to last post
  47. Null Hypothesis

    I am new to Statistics and using Chi Square test in R. My output is : X-squared = 4.5765, df = 2, p-value = 0.1014 How do i conclude if Null...

    Started by snowoman‎, 07-10-2016 08:58 AM
    null hypothesis
    • Replies: 1
    • Views: 1,302
    07-10-2016, 10:56 AM Go to last post
  48. Productivity Formula with multiple inputs?

    I'm trying to evaluate employee productivity when there are multiple variable inputs. Example: Employee #1 produced 10 cases that include working...

    Started by dwiggins‎, 07-09-2016 11:28 PM
    • Replies: 0
    • Views: 1,957
    07-09-2016, 11:28 PM Go to last post
  49. Confidence interval for Cohen's H

    hi everyone, I would like to create a Forest plot for a number of studies that looked at proportions. I calculated effect sizes using Cohen's H, but...

    Started by judithv‎, 07-08-2016 09:36 AM
    cohen's h, confidence interval, effect size
    • Replies: 0
    • Views: 1,039
    07-08-2016, 09:36 AM Go to last post
  50. ARCH-process with exponencial variance function

    I need some help for a proof regarding Engles ARCH-paper from 1982. For an ARCH-process with a variance function h_t = exp(a_0 + a_1 y_{t-1}^2)...

    Started by Mst‎, 07-07-2016 12:44 PM
    arch, exponencial, time series, variance
    • Replies: 0
    • Views: 1,179
    07-07-2016, 12:44 PM Go to last post
  51. Exclamation Need assistance choosing the correct test for two nominal variables.

    Hi! I have a single sample and asked them to think about their best and worst experiences in a class project. They answered identical sets of...

    Started by kjwesner‎, 07-05-2016 03:20 PM
    help me!, nominal data analysis, statistical test
    • Replies: 1
    • Views: 1,413
    07-07-2016, 02:12 AM Go to last post
  52. Effect Sizes

    This may seem like a ridiculous question, but it's bugging me and no text book or paper I've read has answered it. I am looking into research on...

    Started by chadwae‎, 07-06-2016 05:26 PM
    effect size, research, statistics
    • Replies: 5
    • Views: 1,650
    07-06-2016, 09:11 PM Go to last post
  53. Surveying Question

    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, 07-06-2016 01:39 PM
    statistical help
    • Replies: 0
    • Views: 1,129
    07-06-2016, 01:39 PM Go to last post
  54. Mean vs Standard Deviation Exercise

    Hey everyone. I would like to know your opinion on the following exercise: We have 2 coders teams (A and B). We want to choose the team who...

    Started by StatisticsCenas‎, 07-05-2016 09:41 AM
    mean standard deviation
    • Replies: 4
    • Views: 2,662
    07-06-2016, 01:38 PM Go to last post
  55. Question What test to use with 1 group?

    Hello Please provide assistance on what test to use for: 1 group with n = 500 Research QS: Is listening to whistling a problem? Question...

    Started by Aarti‎, 07-06-2016 03:00 AM
    what test to use
    • Replies: 1
    • Views: 1,351
    07-06-2016, 05:04 AM Go to last post
  56. Normal distribution

    Hi, X ~ Normal(15,8) Y ~ Normal 10, 6) How can I calculate Prob (X>Y)? if: (a) X and Y are not depending on each other with 0 correlation

    Started by samot79‎, 07-05-2016 02:17 AM
    • Replies: 1
    • Views: 1,147
    07-05-2016, 02:37 AM Go to last post
  57. 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: 4,294
    07-05-2016, 01:42 AM Go to last post
  58. Creating standard normal distribution with difference variances within quartiles

    Hi, I have 10,000 data points referring to data on dogs that follow a positively skewed distribution that I have grouped into quartiles. I...

    Started by talkbox‎, 07-04-2016 05:08 PM
    normal distribution, variance components
    • Replies: 0
    • Views: 1,009
    07-04-2016, 05:08 PM Go to last post
  59. spss- questionnaire of two different groups

    hey there i have a questionnaire likert scale, which was filled be various colleges of both public and private sector. i have started to enter the...

    Started by jirrah‎, 07-03-2016 10:15 AM
    • Replies: 0
    • Views: 1,272
    07-03-2016, 10:15 AM Go to last post
  60. Predicted variable

    Dear all, I need help how to predict the hours variable from the model below. I used the mixed logit and have as a dependent variable y and hours...

    Started by Lena‎, 07-03-2016 07:18 AM
    • Replies: 1
    • Views: 1,437
    07-03-2016, 08:47 AM Go to last post

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