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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: 197,262
    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: 67,029
    09-30-2005, 09:44 AM Go to last post
  1. Question Can you help?

    Can anyone help with survey sampling? I need help with my Sampling Methods class. I have three homework questions that I have no idea how to...

    Started by arhodes1‎, 09-18-2005 09:24 PM
    • Replies: 8
    • Views: 4,424
    09-21-2005, 08:13 AM Go to last post
  2. Transforming the data

    Hello! I can't understand: In order to transform the data to make it appear more linear, how can I choose what transformation to use, if I don't...

    Started by AlexKom‎, 11-27-2005 12:05 PM
    • Replies: 8
    • Views: 5,046
    11-27-2005, 10:40 PM Go to last post
  3. Please Help Again Data Analysis

    QUESTION- THE DRUG AZT WAS THE 1ST EFFECTIVE TREATMET FOR AID. AN IMPORTANT MEDICAL EXPERIMENT DEMONSTRATED THAT REGULAR DOSES OF AZT DELAY THE ONSET...

    Started by bear‎, 01-18-2006 12:58 PM
    • Replies: 8
    • Views: 4,132
    01-19-2006, 07:54 PM Go to last post
  4. Statistics question

    Hi there, I have a stats question regarding a project I'm working on that I do not have the answer to and I would be grateful if anyone can help...

    Started by craigtomk‎, 02-19-2006 05:49 AM
    • Replies: 8
    • Views: 3,555
    03-04-2006, 10:38 PM Go to last post
  5. Nonparametric test choice for skewed data

    Hello, My first thread on the board... I posted this to the SPSS-X list , but thought this forum may be more appropriate. I was wondering if...

    Started by n_knight‎, 03-05-2006 04:42 AM
    • Replies: 8
    • Views: 9,850
    01-12-2007, 04:05 PM Go to last post
  6. Dealing with nonresponses

    What can be done to compensate nonresponses in the sample (Aside from eliminating them, that is.)? Should they always be excluded from the sample...

    Started by Emawk‎, 03-05-2006 10:20 PM
    • Replies: 8
    • Views: 2,959
    03-08-2006, 11:42 PM Go to last post
  7. Help with choosing the right method

    Hi I'm new to stats as you will probably become aware. Just need a little help to understand which statistical method should be used to test a...

    Started by scotchpie‎, 05-02-2006 01:35 PM
    • Replies: 8
    • Views: 2,771
    05-12-2006, 08:52 AM Go to last post
  8. R value Anova

    Hi all can someone tell me when we are assessing the significance vlaue in ANOVA, do we measure it against the adjusted R value provided at the...

    Started by jenny‎, 05-08-2006 12:57 PM
    • Replies: 8
    • Views: 3,915
    05-12-2006, 09:16 AM Go to last post
  9. 95% confidence interval help

    How much money does the average professional football fan spend on food at a single football game? That question was posed to ten randomly selected...

    Started by sinful‎, 10-25-2006 04:50 PM
    • Replies: 8
    • Views: 9,175
    10-25-2006, 09:36 PM Go to last post
  10. Might be a silly question about t-tests but...

    ...i really need some advice about how to go about comparing some means. Basically, I have the means and standard deviations for three different...

    Started by Zzzz‎, 11-10-2006 10:14 AM
    • Replies: 8
    • Views: 3,068
    11-10-2006, 01:33 PM Go to last post
  11. Converting scores to a metric

    Scores for the AAT are reported with a mean of 80 and a standard deviation of 8. Martina received a raw score of 84 on the math portion of the AAT. ...

    Started by latonya1‎, 06-17-2007 01:14 PM
    • Replies: 8
    • Views: 4,205
    06-18-2007, 12:48 PM Go to last post
  12. Data Transformation

    Hello, I have a huge amount of data derived from replicated simulations. If I plot a frequency chart I have a distribution that looks like a...

    Started by pittopitto‎, 08-23-2007 02:56 AM
    • Replies: 8
    • Views: 3,713
    08-28-2007, 06:49 PM Go to last post
  13. Question Help - what type of test do I use

    Hello, I am trying to analyze survey data for my thesis. One of my hypothesis states that there is agreement among respondents on different...

    Started by Lauren‎, 03-05-2008 01:39 PM
    • Replies: 8
    • Views: 3,402
    03-05-2008, 08:03 PM Go to last post
  14. Exponential PDFS

    Hey, I need some help with the below questions, any help would be great. Thanks. The length of time in minutes, Y, that a customer spends in line...

    Started by Taka‎, 04-21-2008 10:32 PM
    • Replies: 8
    • Views: 83,200
    04-23-2008, 06:10 AM Go to last post
  15. I want large set of data

    Hello every body; Do any 1 here knows where can I find a large set of data? I mean a big set of data to analyze it in my project any help...

    Started by zahra‎, 05-08-2008 02:11 PM
    • Replies: 8
    • Views: 4,444
    05-29-2008, 08:08 AM Go to last post
  16. Quick question about sample size

    Gentlemen, I have recently starting working in a call center environment. All our incentives, bonuses, and quality scores are based on 30 calls...

    Started by Jmz555‎, 06-28-2008 11:41 AM
    • Replies: 8
    • Views: 2,985
    07-12-2008, 05:44 AM Go to last post
  17. Post Check my answer, v2 | Correlation coefficients.

    Me again! Id like to say thanks so far to all those who've helped me :) Got this question on coefficients, ive answered what ithink is good, but...

    Started by Mosphaitus‎, 08-17-2008 01:07 PM
    • Replies: 8
    • Views: 4,079
    08-17-2008, 02:46 PM Go to last post
  18. Help with interpreting P Value

    I am stuck with trying to analyse some test result. Ive done a two sample tests similar to a t test (but its for ordinal variables so compares...

    Started by spikey_monkey‎, 08-20-2008 07:42 AM
    • Replies: 8
    • Views: 3,968
    08-23-2008, 08:49 AM Go to last post
  19. Standard error - why sqrt of n?

    I happened to be browsing through some standard explanations of confidence intervals and came upon the formula for standard error... t x (stddev /...

    Started by jawon‎, 09-22-2008 03:03 PM
    • Replies: 8
    • Views: 34,307
    10-15-2008, 09:57 PM Go to last post
  20. calculating population variance from sampling distribution variance

    Hi all, Let's say that I want to estimate the population mean and variance of a large bag of popcorn (unpopped). I have a scale, but it's not...

    Started by babucher‎, 10-20-2008 02:33 PM
    • Replies: 8
    • Views: 24,071
    05-23-2010, 02:45 PM Go to last post
  21. Pearson's r help!

    Hi, I'm new to this forum, and glad I found it! I'm relatively new to stats too but am doing a Masters program that requires that I get my head...

    Started by angusthewestie‎, 11-29-2008 11:42 AM
    • Replies: 8
    • Views: 9,900
    11-29-2008, 05:57 PM Go to last post
  22. meta-analysis; negative pop'n variance

    I have been trying to compute a meta-analysis (I actually did it before christmas but have since had to change one of the numbers). Since changing...

    Started by kitty_cat00‎, 02-07-2009 12:23 PM
    • Replies: 8
    • Views: 2,647
    02-11-2009, 08:53 AM Go to last post
  23. Smile Ancova help

    Hi, This is my first time posting here, so please forgive me if I'm not accurate enough. I've been doing an ancova in R. This is what I have...

    Started by Riverrequiem‎, 04-12-2009 01:03 PM
    solved
    • Replies: 8
    • Views: 3,589
    04-15-2009, 09:46 AM Go to last post
  24. Im not good at stat can someone help me?

    Ok i need help with a question that i need help with out of a story problem i have this information expected value = 20,000 .90 probability...

    Started by klgrant‎, 04-22-2009 05:15 PM
    • Replies: 8
    • Views: 3,092
    04-22-2009, 09:17 PM Go to last post
  25. repeated measures clarification

    Hi- This is probably a basic question, but I'm really confused on the type of statistic to perform on the following analysis and I was wondering...

    Started by ohanimbus‎, 06-10-2009 12:58 PM
    • Replies: 8
    • Views: 2,552
    06-15-2009, 08:07 AM Go to last post
  26. help on statistic at least one

    does anyone know how to get this answer a sample of 4 different claculator is randomly selctedf from a group containing 14 that are defective and...

    Started by chrischemma‎, 06-18-2009 09:14 AM
    • Replies: 8
    • Views: 3,260
    06-18-2009, 12:15 PM Go to last post
  27. Calculating Probability from the Mean, and Standard Deviation

    If anyone may be able to give me a little insight into how I would go about answering this question I would greatly appreciate it. This is the...

    Started by aunistudent‎, 11-07-2009 01:40 PM
    • Replies: 8
    • Views: 114,657
    11-08-2009, 04:30 PM Go to last post
  28. Question I need help with these 3 problems....i cant get the answers...been trying for hours

    Please. somebody...i need help and i cant find anybody to help me. :( 1.) The summary statistics give below were taken from random samples that...

    Started by matt34235‎, 12-13-2009 02:51 PM
    • Replies: 8
    • Views: 3,011
    12-13-2009, 11:20 PM Go to last post
  29. Unhappy please help an exhausted and stressed student!

    I would be so eternally greatful if somebody could please help me! I am doing my dissertation and have come to analysing my data using SPSS, and i am...

    Started by psycstudent‎, 02-09-2010 05:33 AM
    • Replies: 8
    • Views: 2,846
    02-09-2010, 06:04 PM Go to last post
  30. In Need of Article to Analyze

    i have to find an article to analyze..it's a research paper project for statisctics of business course.. any article suggestion? thanks in advance

    Started by dadalife‎, 05-12-2010 05:23 AM
    • Replies: 8
    • Views: 6,054
    05-13-2010, 02:57 PM Go to last post
  31. which test to use??

    What can we observe from a simple boxplot?? I dont see the use of one, except for showing visually the data but aside form that it seems pretty...

    Started by Boa‎, 06-13-2010 07:39 PM
    • Replies: 8
    • Views: 3,559
    06-15-2010, 11:32 AM Go to last post
  32. nonparametric test percentages?

    I have a data set that doesn't fulfil the assumptions of normal distribution and equal variances. SInce it's percentage values, the recommended...

    Started by saraelf‎, 06-24-2010 02:11 PM
    • Replies: 8
    • Views: 9,741
    06-28-2010, 05:01 PM Go to last post
  33. Question HELP! - Statistical Significance Problem

    The manufacturer of a daily dietary supplement claims that its product will help people lose weight. The company obtains a random sample of 950 adult...

    Started by istew9‎, 07-15-2010 01:47 PM
    • Replies: 8
    • Views: 11,539
    07-16-2010, 12:32 PM Go to last post
  34. Where to from here - Basics - Help Needed

    Hi guys, I have a research report I am writing currently. We have had to make two hypotheses; one about a relationship and another about a...

    Started by diavolina‎, 08-15-2010 05:37 AM
    • Replies: 8
    • Views: 3,112
    08-15-2010, 08:17 AM Go to last post
  35. Mixed models: Calculating ICC for model with a random intercept and a random slope

    Hello All, I have a question about how to calculate an intraclass correlation coefficient in a mixed model that has both a random intercept and a...

    Started by pjmiller_57‎, 09-18-2012 12:02 PM
    • Replies: 8
    • Views: 8,312
    08-14-2017, 06:26 PM Go to last post
  36. Ratio of Means - appropriate test for single or multiple comparisons? Fieller's CI?

    I would really appreciate any suggestions with the following data analysis issue. Please read till the end as the problem at first may appear...

    Started by biophysics‎, 05-06-2013 12:18 AM
    comparison, confidence interval, overlapping, ratio of means, tests of significance
    • Replies: 8
    • Views: 2,498
    10-07-2015, 12:25 PM Go to last post
  37. Question Absolute Loss Function

    I am quite honestly at an "absolute loss" with this one... I know the answer can't be 2 yet I keep getting it.. any help is much appreciated. ...

    Started by Shaun2010‎, 10-09-2013 01:05 PM
    baysian, decision theory, loss function
    • Replies: 8
    • Views: 7,008
    12-05-2016, 10:07 AM Go to last post
  38. Question about "nesting" in sas

    Hi there, I am a new guy for SAS. I have a question about "nesting" in SAS. If A is nested in B and B is nested in C, how to coding the random...

    Started by yzdu‎, 05-27-2015 04:15 PM
    • Replies: 8
    • Views: 1,940
    06-03-2015, 06:11 PM Go to last post
  39. PISA 2012: Calculating variance explained by ESCS

    Hi there! I was wondering if anyone could help me figure out why I am getting the wrong results! I am using the PISA dataset of 2012 to calculate...

    Started by jenjen91‎, 07-26-2015 05:30 PM
    • Replies: 8
    • Views: 3,201
    07-27-2015, 07:03 PM Go to last post
  40. Violating Linear Regression assumptions

    I have a dataset in which I am performing linear regression with multiple covariates. The goal of the analysis is to identify important covariates...

    Started by farre1pd‎, 07-29-2015 03:20 PM
    assumptions, autocorrelation, linear regression, residuals non-normal
    • Replies: 8
    • Views: 1,580
    07-31-2015, 08:38 AM Go to last post
  41. How to find the error or deviation, in this case?

    Hi I have two data sets, for example A and B. Where A is produced from the experimental work and B is evaluated based on mathematical modeling....

    Started by DR117‎, 08-27-2015 09:12 AM
    • Replies: 8
    • Views: 3,184
    08-28-2015, 09:46 AM Go to last post
  42. New here and completely lost :/

    Hello everyone! I’m a newbie here and to be honest in desperation googled “psychology statistics forum” thinking no way I’d find one and low and...

    Started by Turnip‎, 09-08-2015 04:52 PM
    introduction
    • Replies: 8
    • Views: 1,597
    09-11-2015, 04:55 PM Go to last post
  43. Assessing equivalency on pre-test

    Hi, I am running an independent samples t-test on scores on a post-test continuous measure for two groups...there was no random assignment...

    Started by derekcruise‎, 11-05-2015 05:49 PM
    • Replies: 8
    • Views: 1,124
    11-05-2015, 11:37 PM Go to last post
  44. "You never see a Ferrari rust like a Honda"

    When someone says "You never see a Ferrari rust like a Honda", the logical flaw is that a Honda is typically used as daily drivers thru severe...

    Started by CrunchAndSee‎, 12-03-2015 03:59 PM
    • Replies: 8
    • Views: 2,670
    12-31-2015, 03:00 PM Go to last post
  45. Linear Regression Question

    Hello Everyone. So I'm doing a stats assignment, and I'm having difficulty answering one of the questions. Here's the background question. A study...

    Started by ArchAngel‎, 01-07-2016 07:48 AM
    • Replies: 8
    • Views: 1,487
    01-07-2016, 06:19 PM Go to last post
  46. Main effect and interaction? Need help interpreting the graph.

    We performed a multiple linear regression with valence (negative, positive and neutral) as independent variable, social curiosity as controll...

    Started by NikYouKnow‎, 02-07-2016 09:07 AM
    • Replies: 8
    • Views: 2,318
    02-09-2016, 11:03 AM Go to last post
  47. Skewed Data

    Good Morning, I am wondering if anyone can provide some advice regarding a problem with a large data set I have. I have a lot of outbreak...

    Started by SiobhanRoisin‎, 02-10-2016 05:11 AM
    non-probability sampling
    • Replies: 8
    • Views: 2,217
    02-11-2016, 04:39 PM Go to last post
  48. Sample size vs population and sampling accuracy.

    How do I calculate the accuracy of a sample of a population? I have a population of 30000 + records with a yes or no answer. If I only sample 20,...

    Started by dircur‎, 02-12-2016 04:18 PM
    • Replies: 8
    • Views: 2,392
    02-22-2016, 02:42 PM Go to last post
  49. Relationship between effect size, sample size and p-value?

    Is there a simple formula that links effect size, sample size and p-value? Specifically, how does the p-value depend on effect size and sample...

    Started by KelvinS‎, 03-13-2016 07:47 AM
    effect size, p-value, sample size
    • Replies: 8
    • Views: 4,915
    03-13-2016, 03:24 PM Go to last post
  50. N trials, 3 possible outcomes

    I have n independent trials, where the result of each trial is either A, B or C, with probabilities a, b and c respectively, so that a + b + c = 1. ...

    Started by KelvinS‎, 03-09-2016 06:26 AM
    trinomial
    • Replies: 8
    • Views: 1,360
    03-09-2016, 12:37 PM Go to last post
  51. Relationship Between Increasing Mean and Standard Deviation

    Greetings, we sampled some fungal populations from an agricultural field. Our sample size is 24, and we sampled six plots. We noticed the standard...

    Started by stat4640‎, 03-13-2016 01:32 PM
    coefficient of variation, heteroscedasticitet
    • Replies: 8
    • Views: 2,209
    04-08-2016, 02:05 PM Go to last post
  52. Significant

    So I have this data set and when looking for a relationship between two variables i created the attached plot. Then i started to fit a model to...

    Started by Prometheus‎, 04-26-2016 07:11 AM
    • Replies: 8
    • Views: 1,385
    04-28-2016, 03:52 AM Go to last post
  53. Confidence Intervals for Proportions -- Two ways to estimate population value?

    Hi everyone, I'm wondering if anyone could help shed some light on why there appear to be two different ways that different textbooks show to...

    Started by Frodo/Sociology‎, 06-28-2016 09:08 AM
    confidence interval
    • Replies: 8
    • Views: 1,503
    06-30-2016, 10:35 PM Go to last post
  54. Interpretation of 99% confidence interval

    Hello guys, this is my first post here in the forum and if I missed anything, then pls correct me. My first statistic class starts this week...

    Started by 7thSlap‎, 09-06-2016 10:32 AM
    • Replies: 8
    • Views: 1,445
    09-06-2016, 04:09 PM Go to last post
  55. Question about permutations ANOVA test

    Hello everyone, I have data of a variable from 4 sites, with 3 repetitions from each site. Tests revealed that I do have homoscedasticity but no...

    Started by Royan‎, 08-31-2016 06:31 AM
    anova, permutation, repetitions
    • Replies: 8
    • Views: 1,254
    09-02-2016, 05:31 AM Go to last post
  56. Cross validation question

    Hi guys, I am a bit confused about what k-fold Cross Validtation does. Is it better to remove non significant variables and tune with k-fold cross...

    Started by datum‎, 11-16-2016 05:34 PM
    cross validation, model fit, regression
    • Replies: 8
    • Views: 2,502
    12-01-2016, 09:23 AM Go to last post
  57. What is Experimental Design

    Hi all, it's been awhile since I've posted. Is there a concise description of what experimental design is in regards to statistics? I'm trying to...

    Started by Buckeye‎, 12-20-2016 01:58 PM
    • Replies: 8
    • Views: 3,758
    12-21-2016, 10:00 AM Go to last post
  58. Cluster analysis with conjoint analysis data

    Hello everybody, My team and I have an assignment to run a conjoint analysis with SPSS. So far, we were able to make the orthogonal design to...

    Started by Thaosen‎, 04-14-2017 01:48 PM
    cluster, cluster analysis, conjoint analysis, spss
    • Replies: 8
    • Views: 1,161
    04-16-2017, 04:40 AM Go to last post
  59. Why normality assumption needed?

    I often see that for parametric tests one assumption is that the population should be normally distributed. However if I understand correctly the...

    Started by blubblub‎, 04-06-2017 07:23 AM
    normality test
    • Replies: 8
    • Views: 1,818
    04-06-2017, 02:13 PM Go to last post
  60. Bayes - need help informing priors

    Hi! Anyone here familiar with Bayesian inference? I would like to inform priors for an analysis. I have Odds Ratios and 95% CIs. How would I...

    Started by raske2‎, 10-04-2017 07:23 PM
    bayes, confidence intervals, informed priors, variance
    • Replies: 8
    • Views: 318
    10-09-2017, 06:41 PM Go to last post

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