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Forum: Statistics

Statistics course and homework discussion. Elementary statistics.

  1. 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: 66,912
    09-30-2005, 09:44 AM Go to last post
  2. 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: 197,077
    07-16-2014, 11:01 AM Go to last post
  1. Question help me to identify the no of employees i should use for my research

    I am supposed to do a project on employee turnover and particular company have 500 employees and their annual turnover is 12%. I need to know no...

    Started by ange88‎, 11-15-2012 02:29 AM
    • Replies: 2
    • Views: 2,159
    11-16-2012, 04:01 AM Go to last post
  2. mean/standard deviation/percentile?

    Hi guys, I am a first year statistics students and I'm a bit shaky on the subject. Please help me with the question below. Thanks! Question The...

    Started by Angela‎, 09-02-2007 03:38 AM
    • Replies: 0
    • Views: 1,813
    09-02-2007, 03:38 AM Go to last post
  3. Figuring which two test to use? please help.

    Hi guys, I am a first year statistics students and I'm a bit shaky on the subject. Please help me with the question below. Thanks! Question2 ...

    Started by Angela‎, 09-02-2007 03:41 AM
    • Replies: 1
    • Views: 2,592
    09-03-2007, 02:50 AM Go to last post
  4. Figuring which test to run? please help.

    Hi guys, I am a first year statistics students and I'm a bit shaky on the subject. Please help me with the question below. Thanks! Question3 An...

    Started by Angela‎, 09-02-2007 03:44 AM
    • Replies: 0
    • Views: 2,208
    09-02-2007, 03:44 AM Go to last post
  5. Using the one sample to the population t test?

    Hi guys, I am a first year statistics students and I'm a bit shaky on the subject. Please help me with the question below. Thanks! Question4 ...

    Started by Angela‎, 09-02-2007 03:46 AM
    • Replies: 0
    • Views: 2,692
    09-02-2007, 03:46 AM Go to last post
  6. Using the independent t test?

    Hi guys, I am a first year statistics students and I'm a bit shaky on the subject. Please help me with the question below. Thanks! Question5 A...

    Started by Angela‎, 09-02-2007 03:47 AM
    • Replies: 0
    • Views: 3,117
    09-02-2007, 03:47 AM Go to last post
  7. Using the Chi-square Goodness of fit test?

    Hi guys, I am a first year statistics students and I'm a bit shaky on the subject. Please help me with the question below. Thanks! Question6 A...

    Started by Angela‎, 09-02-2007 03:49 AM
    • Replies: 0
    • Views: 2,451
    09-02-2007, 03:49 AM Go to last post
  8. one big fat factor!!

    one big fat factor!! model 1.Y = X + V + X*V model 2. Y = X + V + X*V + M1 + M2 model 3.(M1, M2) = X + V + X*V" (please refer to my curvilinear...

    Started by angelaabd‎, 02-12-2009 01:44 PM
    • Replies: 0
    • Views: 2,118
    02-12-2009, 01:44 PM Go to last post
  9. three way interaction!!

    for three way interaction (a*b*c)to make sense, do all the two -ways(a*b, A*c, b*c) have to be significant ? thanks

    Started by angelaabd‎, 03-26-2009 12:45 PM
    • Replies: 2
    • Views: 2,687
    03-30-2009, 03:36 PM Go to last post
  10. Question ANOVA's

    Is it possible for someone to tell me how to do them?

    Started by angeleyes‎, 10-17-2005 09:30 PM
    • Replies: 2
    • Views: 3,394
    10-17-2005, 09:48 PM Go to last post
  11. Most probable extreme value and sample size

    Dear all, I read that if the distribution of X belongs to the exponential family, then the maxima drawn from a sample of X follow: ...

    Started by Angelos‎, 12-29-2011 12:40 PM
    • Replies: 0
    • Views: 2,640
    12-29-2011, 12:40 PM Go to last post
  12. Root Mean Square Fluctuation

    Problem: I have a large amount of money to invest in large number S stocks, each of the same value. For this particular company, the expected return...

    Started by AngelsAdvent‎, 09-19-2014 11:48 PM
    • Replies: 2
    • Views: 2,223
    09-22-2014, 05:30 PM Go to last post
  13. need help =(==plz reply ASAP

    (Q) a researcher is interested in whether a new cold medication affects mental alertness. the researcher administers the new cold medication to 16...

    Started by angel_eyez88‎, 06-09-2008 12:37 AM
    • Replies: 2
    • Views: 2,520
    06-09-2008, 02:11 PM Go to last post
  14. z-score testing

    My standard deviation is 2.066, my mean is 2.066. Calculate the z-score for the smallest and largest of observations. my smallest...

    Started by Angel_lis‎, 03-06-2010 04:53 PM
    • Replies: 0
    • Views: 4,727
    03-06-2010, 04:53 PM Go to last post
  15. Expected Values HELP!

    Here is the question: What is the expected value of a dollar bet? There are three wheels, each with 20 spaces. Reel one: 10 cherries, 6...

    Started by Angie Thompson‎, 10-28-2006 06:37 PM
    • Replies: 2
    • Views: 2,807
    10-30-2006, 03:07 PM Go to last post
  16. Exclamation Problems on Chi-square Statistics

    Can anyone tell me what will the mean-square chi-square statistics i.e. a χ2 statistic divided by its d.f. tends to as the d.f. tends to infinity? ...

    Started by angie02‎, 11-16-2011 10:44 AM
    • Replies: 5
    • Views: 2,180
    11-16-2011, 11:58 PM Go to last post
  17. Question Levels of measurement

    Hi, I have just started taking a Research Methods course, and my stats are a bit rusty. I am trying to complete an assignment, and there is a...

    Started by AngieDriscoll‎, 02-04-2009 07:32 PM
    • Replies: 0
    • Views: 1,971
    02-04-2009, 07:32 PM Go to last post
  18. Need help-clueless about statistics!

    I am clueless about statistics so probably my questions will sound stupid.In any case, I would appreciate any help you could give me. My research...

    Started by angoslezq‎, 10-31-2008 12:03 PM
    • Replies: 4
    • Views: 2,440
    11-01-2008, 03:59 PM Go to last post
  19. Correlational analysis

    I am doing a quantitative case study on L2 phonological acquisition in a class of foreign language learners.The number of students in the class is...

    Started by angoslezq‎, 03-30-2010 09:42 AM
    • Replies: 1
    • Views: 2,503
    03-30-2010, 01:05 PM Go to last post
  20. Help with research design!

    Hi everyone I am doing a study in foreign language learning. I have one dependent variable(interval) and several IVs: motivation(interval),...

    Started by angoslezq‎, 04-27-2010 06:24 AM
    • Replies: 0
    • Views: 2,074
    04-27-2010, 06:24 AM Go to last post
  21. Kruskal-Wallis test in SPSS

    I have used The Kruskal-Wallis test to compare the performance on three groups of students. SPSS tells me that the null hypothesis can be rejected...

    Started by angoslezq‎, 04-29-2010 01:59 PM
    • Replies: 3
    • Views: 14,662
    04-29-2010, 06:05 PM Go to last post
  22. doubly manova

    Hi There, Having run an intervention study recently I now have the task of analysisng the data. I have 2 IV's (time (pre, mid and post), group...

    Started by angrykid‎, 09-18-2007 09:58 AM
    • Replies: 0
    • Views: 2,481
    09-18-2007, 09:58 AM Go to last post
  23. power calculations

    Hi I was just wondering if anyone can help me with a thesis revision. I did not do power calculations for my studies which are based in the school...

    Started by angrykid‎, 02-09-2009 11:58 AM
    • Replies: 0
    • Views: 1,793
    02-09-2009, 11:58 AM Go to last post
  24. 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: 9,877
    11-29-2008, 05:57 PM Go to last post
  25. Can I reject the null hypothesis?

    Hi, I'm just finishing off the analysis of an experiment on empathising and systemising (Baron-Cohen). My problem is that in the final hypothesis,...

    Started by angusthewestie‎, 12-09-2008 11:56 AM
    • Replies: 2
    • Views: 3,439
    12-09-2008, 04:05 PM Go to last post
  26. How to set up scores in SPSS

    Hi, I've completed data collection for my research project and am wondering if someone could clarify a question for me, as I start on my analysis....

    Started by angusthewestie‎, 06-03-2009 08:02 AM
    • Replies: 0
    • Views: 2,588
    06-03-2009, 08:02 AM Go to last post
  27. Homogeneity of variance

    I've been checking my data for parametric requirements. I am comparing scores from 3 different sample groups. When comparing the variance across...

    Started by angusthewestie‎, 06-03-2009 10:15 AM
    • Replies: 0
    • Views: 4,249
    06-03-2009, 10:15 AM Go to last post
  28. Difference between Tukey and Cohen's D?

    Hi, I am writing up the analytical strategy section of a Master's dissertation. My supervisor advised me to calculate effect sizes using Tukey HSD...

    Started by angusthewestie‎, 06-12-2009 08:43 AM
    • Replies: 0
    • Views: 2,759
    06-12-2009, 08:43 AM Go to last post
  29. Question Is MLM best?

    Hi, I'm considering methods of analysis for a project I am working on. It is an educational project that will potentially have upwards of 10...

    Started by Angusthewestie‎, 05-05-2010 09:33 AM
    • Replies: 0
    • Views: 2,210
    05-05-2010, 09:33 AM Go to last post
  30. Chi2 test

    Hi! I have a problem with this test. We had to write report on prevalence of infected snails at two seasides and base it on Chi2 test...

    Started by Ania‎, 12-05-2006 12:25 PM
    • Replies: 2
    • Views: 2,371
    12-05-2006, 04:05 PM Go to last post
  31. Please help me interpret interaction terms (dummy*continuous) in OLS regression

    Dear all, I am having some conceptual difficulties in understanding and interpreting interaction terms (between a dummy and a continuous variable)...

    Started by anika13‎, 03-27-2015 10:45 PM
    • Replies: 2
    • Views: 2,308
    03-28-2015, 12:16 PM Go to last post
  32. Paired t-tests

    Hi i hope someone can help ive got two groups one control as the wild type and one treatment groups, im measuring the length of cilia, so in the...

    Started by ANila‎, 09-05-2011 04:42 PM
    • Replies: 3
    • Views: 2,421
    09-05-2011, 08:01 PM Go to last post
  33. ANSI/ASQC Q3 - determine sample size?

    Hello, I have been required to determine the sample size and risk using ANSI/ASQC Q3 tables. This is to come up with samples to inspect...

    Started by animateme‎, 03-29-2011 03:06 PM
    • Replies: 0
    • Views: 3,450
    03-29-2011, 03:06 PM Go to last post
  34. Artificially create biased sample for low response

    Hi all, I am building a binary 0/1 logistic model where the response rate is very low (0.6%, 77000 out of 12000000). One suggestion was to...

    Started by anindya_mozumdar‎, 05-15-2007 09:29 AM
    • Replies: 0
    • Views: 2,290
    05-15-2007, 09:29 AM Go to last post
  35. design an experiment given a previous one

    hello my question is : i have preformed an experiment on an electronic device. the experiment was running the device 110000 cycles in which i...

    Started by anir10‎, 07-27-2012 09:35 AM
    • Replies: 1
    • Views: 1,462
    07-27-2012, 01:29 PM Go to last post
  36. normal distribution need help

    Suppose we take random sample of size n=25 from a normal distribution with mean 10 and standard deviation 5. If samples of size 25 are taken...

    Started by aniruddha.moitra‎, 09-02-2011 05:46 AM
    • Replies: 8
    • Views: 2,995
    09-03-2011, 10:23 AM Go to last post
  37. Testing hypothesis - business statistics

    Hey guys I'm having some trouble with a stats question for uni. The question is as follows: A company is thinking of updating its mobile phone...

    Started by anital‎, 10-11-2008 11:16 AM
    • Replies: 4
    • Views: 5,412
    10-13-2008, 10:02 AM Go to last post
  38. pls help me

    Hello, I am doing a project on effectiveness of feedback mechanism during appraisl discussion... I have been asked to seperate questionnaire...

    Started by anitha‎, 03-10-2008 12:06 AM
    • Replies: 1
    • Views: 1,759
    03-11-2008, 04:11 PM Go to last post
  39. Question Coursework help

    Hello.......I'm desperate for some help here......Let me give you a backdrop to my predicament....I started a degree in Sociology this semester. Part...

    Started by Anjanie‎, 10-02-2010 11:23 PM
    • Replies: 3
    • Views: 2,693
    10-18-2010, 09:42 AM Go to last post
  40. Ideal process of regression for amall samples

    I have a sample having 19 observations and 4 variables. Please tell me, which method of regression can be used here. Could I Cox's model of...

    Started by anjanray1971‎, 06-28-2016 05:11 AM
    • Replies: 0
    • Views: 1,197
    06-28-2016, 05:11 AM Go to last post
  41. Question Normal distribution & Kurtosis

    I have been of the view that a STANDARD NORMAL DISTRIBUTION is Mesokurtic. And if the standard deviation increases, the normal distribution becomes...

    Started by anjan_oleti‎, 05-18-2011 12:43 AM
    • Replies: 0
    • Views: 2,211
    05-18-2011, 12:43 AM Go to last post
  42. Help with a real world problem

    Hello, I was wondering if anybody could help me with the following problem (this is an actual real life situation, not a textbook problem) A...

    Started by anjur‎, 10-30-2007 08:16 PM
    • Replies: 0
    • Views: 2,236
    10-30-2007, 08:16 PM Go to last post
  43. Showing Beta is from Exponential family

    I'm trying to do the proof for beta to exponential family proof. here is what I did Can somebody check it and tell me if it's good? ...

    Started by ankc‎, 12-11-2012 12:15 PM
    • Replies: 4
    • Views: 2,564
    12-13-2012, 01:36 PM Go to last post
  44. To add a covariate or not to add a covariate

    Hi, I'm faced with a statistical dillema, so if anyone could give me some advice I would appreciate it. I want to compare two groups: a...

    Started by Anke‎, 07-17-2009 10:05 AM
    • Replies: 0
    • Views: 2,504
    07-17-2009, 10:05 AM Go to last post
  45. Which Statistical method to be used for the below problem?

    I want to know which statistical method to use for the below problem. Suppose I have the revenue data of 5 companies in the same industry. And, also...

    Started by ankit.narsaria‎, 08-05-2014 06:16 AM
    • Replies: 0
    • Views: 945
    08-05-2014, 06:16 AM Go to last post
  46. Help Needed with choosing the tests

    Hi all, I'm doing a survey based research and need help in choosing tests in spss for comparing data. My sample included two populations (Urban &...

    Started by ankitaseeram‎, 05-18-2014 06:42 AM
    • Replies: 2
    • Views: 1,413
    05-18-2014, 09:44 AM Go to last post
  47. Simple percentage comparison

    Hi, I am working on a competition between 4 groups of people. The winner is the person who gets the most number of participants to show up at their...

    Started by ankrunner‎, 01-15-2017 10:04 AM
    • Replies: 1
    • Views: 1,970
    01-15-2017, 12:36 PM Go to last post
  48. Generating random sample for mixture of normal distributions

    Hi, I came across this question - Can someone help me with the approach to solve this problem? Thanks! Ankush

    Started by ankush2kn‎, 10-30-2009 12:41 AM
    • Replies: 1
    • Views: 4,570
    10-30-2009, 07:54 AM Go to last post
  49. Post Finding Variable Pattern within Predefined Clusters

    I have this unique situation where I have predefined clusters (based on certain attributes - that I cant get due to certain restrictions). For each...

    Started by ankyatwork‎, 12-19-2011 04:36 PM
    cluster analysis, pattern variable, predefined, predefined cluster
    • Replies: 0
    • Views: 1,562
    12-19-2011, 04:36 PM Go to last post
  50. How to analyze survey data with three levels of data in SAS?

    We analyze data from a European survey (34 countries ) for quality of life , the sampling procedure is described as a " multi-stage stratified and...

    Started by Anna Johanson‎, 03-04-2014 09:49 AM
    epidemiology, proc glimmix, sas, statistical analysis, survey analysis
    • Replies: 2
    • Views: 2,382
    03-05-2014, 03:42 AM Go to last post
  51. Need help on Sample size

    Hello Everyone, I am working on my dissertation and I need to know what is the sample size I need to have. I will conduct MANCOVA research to...

    Started by anna10‎, 08-01-2007 11:49 AM
    • Replies: 3
    • Views: 2,178
    08-02-2007, 02:46 PM Go to last post
  52. Statistics question help!!

    Hi All, I am new to this forum and seeking some help from you all. I am trying to solve this question to prepare for exam. I would need your help. ...

    Started by anna1999‎, 01-07-2015 03:35 PM
    • Replies: 0
    • Views: 1,479
    01-07-2015, 03:35 PM Go to last post
  53. Question non-parametric two way ANOVA

    Hello, I'm so glad i found this site! I am wondering whether anyone knows of what non-parametric test i could use as equivalent to a two way...

    Started by anna57‎, 11-20-2008 05:32 AM
    • Replies: 7
    • Views: 25,008
    11-21-2008, 11:41 AM Go to last post
  54. Question partial correlations

    Hello, Just a quick question :) When conducting partial correlations does the number of variables you control for the influence of effect the...

    Started by anna57‎, 12-04-2008 04:20 AM
    • Replies: 0
    • Views: 2,807
    12-04-2008, 04:20 AM Go to last post
  55. Exclamation ROC Analysis help!!!

    Hello, I have been conducting an ROC analysis based on the ability of some questionnaire subscales to predict disability. I am getting confused by...

    Started by anna57‎, 03-19-2009 09:19 AM
    • Replies: 1
    • Views: 2,900
    03-26-2009, 05:09 AM Go to last post
  56. sampling distribution

    i have been trying to do this for while, but couldnt figure out how. AUTO ACCIDENTS A study of rush hour traffic in San Francisco counts the...

    Started by annabananaa‎, 01-13-2007 07:54 PM
    • Replies: 3
    • Views: 9,672
    01-17-2007, 05:48 PM Go to last post
  57. Red face One-way anova or paired t-test on intervention study? OR BOTH?

    Hi all. I'm planning a study where I get 3 separate groups of people, make them all do a satisfaction questionnaire, then give each group one...

    Started by annabatho‎, 02-13-2014 06:44 PM
    anova, before and after, one-way anova, paired t-test, t-test
    • Replies: 2
    • Views: 1,474
    05-06-2014, 01:28 PM Go to last post
  58. Is this a 3-way mixed ANOVA?

    I would be very grateful if you could help me: I am carrying out an experiment. I have 3 demographic groups (mothers, carers and old people). ...

    Started by annabatho‎, 05-06-2014 02:18 PM
    anova, mixed anova, repeated measure anova
    • Replies: 1
    • Views: 987
    05-08-2014, 10:39 AM Go to last post
  59. Tail Value at Risk of a bounded single parameter Pareto distribution, L<x<H.

    Hello I am having some difficulties calculating the Tail Value at Risk of the bounded single parameter Pareto distribution, L<x<H. Do you have...

    Started by annago‎, 01-23-2013 01:39 PM
    • Replies: 0
    • Views: 2,105
    01-23-2013, 01:39 PM Go to last post
  60. Geometric standard deviation

    Hi, Can someone help? I'm trying to find a method to calculate geometric standard deviation. I thought you just took the natural log of your values...

    Started by AnnaH‎, 03-26-2008 03:48 AM
    • Replies: 0
    • Views: 2,840
    03-26-2008, 03:48 AM Go to last post

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