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Forum: Psychology Statistics

Psychological statistics, quantitative psychology. Statistics in social sciences. Experimental design, data analysis.

  1. Arrow Sticky Thread Sticky: Please Read This Before Posting

    Please provide us with some basic information before we can give useful advice: 1. purpose of the study / research question / hypotheses, if...

    Started by quark‎, 11-10-2005 12:21 AM
    • Replies: 0
    • Views: 24,260
    11-10-2005, 12:21 AM Go to last post
  1. life table

    I'm doing my Masters in Population studies and this is my assignment question. Could any one of you explain how to solve this problem. I would be...

    Started by fathima‎, 04-16-2006 11:49 PM
    • Replies: 0
    • Views: 2,102
    04-16-2006, 11:49 PM Go to last post
  2. Interpreting interaction terms in multiple regression

    Hi everybody, I'm a master's student who's working on the last analysis for my thesis project. I'm studying possible predictors of satisfaction in...

    Started by K Wilson‎, 04-14-2006 02:47 PM
    • Replies: 1
    • Views: 45,628
    04-14-2006, 10:10 PM Go to last post
  3. Post Exploratory research and Analysis of Responses

    Hi everyone , I am conducting a research in linguistics trying to explore what goes in students ' minds when they read. My sample consists of 150...

    Started by Derfo‎, 04-10-2006 05:00 AM
    • Replies: 1
    • Views: 2,410
    04-10-2006, 07:52 AM Go to last post
  4. Compustat

    Does anyone have compustat industrial annual file which is already in spss sav format, like here http://fmwww.bc.edu/DR/D4.html but I do not have...

    Started by tommy‎, 04-08-2006 06:24 AM
    • Replies: 0
    • Views: 1,761
    04-08-2006, 06:24 AM Go to last post
  5. T-Tests- Which Mean Do I use?

    Ok, I have a group of about 320 students. I am particularly interested in 5 of them that form a group with a characteristic I'm interested in. I...

    Started by kowalsks‎, 04-04-2006 06:08 AM
    • Replies: 3
    • Views: 1,747
    04-06-2006, 04:14 AM Go to last post
  6. Which test appropriate for 2x2 linguistics experiment?

    Hi, I need to analyze a linguistics experiment we did. It was a 2x2 mixed design (one factor: word order, second factor: stress placement). 32...

    Started by slyly‎, 04-03-2006 10:37 AM
    • Replies: 0
    • Views: 1,903
    04-03-2006, 10:37 AM Go to last post
  7. Unhappy Normal Probability Plots to Validate Confidence Interval Results

    I found a 95% t-based confidence interval for a true population mean. The confidence interval was 22.28-24.87, and the true population mean was...

    Started by lilkatez21‎, 04-03-2006 01:03 AM
    • Replies: 0
    • Views: 2,488
    04-03-2006, 01:03 AM Go to last post
  8. Margin of Error help

    I am so stuck here, can you please review and tell me where I went wrong? Annual starting salaries for college graduates with business ...

    Started by shelld‎, 03-31-2006 04:00 PM
    • Replies: 0
    • Views: 2,343
    03-31-2006, 04:00 PM Go to last post
  9. Joint reference prior for normal distribution

    Hello, hoping for some help understanding Bayesian reference priors. This is the first time I have had to resort to Bayesian methods so please be...

    Started by russell‎, 03-27-2006 09:35 PM
    • Replies: 0
    • Views: 2,743
    03-27-2006, 09:35 PM Go to last post
  10. Dunnett's Test and Degrees of Freedom

    Can someone clue me in as to how degrees of freedom are calculated for Dunnett's test for multiple comparisons? We have a data set with 5 groups (1...

    Started by jcoleman51‎, 03-15-2006 08:51 AM
    • Replies: 4
    • Views: 6,622
    03-27-2006, 01:35 PM Go to last post
  11. Appropriate EC50 Stats?

    Hello again: Iím working with some data from an activated sludge respiration inhibition test. We have 6 dose concentrations and a control, all...

    Started by jcoleman51‎, 03-27-2006 12:00 PM
    • Replies: 0
    • Views: 3,196
    03-27-2006, 12:00 PM Go to last post
  12. Can I assume Normal Distribution?

    I am comparing 5(groups) experimental data sets with one Control Group. I am trying to determine which Experimental group is better than the Control...

    Started by jscholen‎, 03-22-2006 11:47 AM
    • Replies: 1
    • Views: 8,128
    03-23-2006, 09:52 AM Go to last post
  13. JohnM: Likert analysis help

    Hi, I was hoping you could give me some guidance on 5 point Likert-type scale analysis. I've read all the threads about it but none fully address...

    Started by Matt Peacock‎, 03-22-2006 02:01 PM
    • Replies: 0
    • Views: 2,165
    03-22-2006, 02:01 PM Go to last post
  14. Question Measuring Success of Treatment

    Hi, I have a fairly basic statistics background so please be patient. I set up an experiment where I have four groups of customers (randomly...

    Started by jman‎, 03-20-2006 07:19 PM
    • Replies: 0
    • Views: 1,904
    03-20-2006, 07:19 PM Go to last post
  15. Red face assumptions

    I've collected data from school children in year 7 (11-12yrs) and year 9 (13-14yrs). I want to see if there is a significant difference in physical...

    Started by angrykid‎, 03-15-2006 09:44 AM
    • Replies: 1
    • Views: 2,005
    03-16-2006, 08:16 AM Go to last post
  16. Statistically significant deviations from the mean

    I am preparing a submission to the Government in which I have to address unemployment levels in an area. The unemployment levels are obtained from...

    Started by rancid98‎, 03-12-2006 08:29 PM
    • Replies: 2
    • Views: 5,963
    03-13-2006, 02:01 AM Go to last post
  17. Sample size for longitudinal study

    Hello, I am assisting in the early planning stages of a three year lab study and I am looking for the best formula to calculate the required...

    Started by mrc‎, 03-09-2006 09:06 AM
    • Replies: 1
    • Views: 3,827
    03-09-2006, 11:18 AM Go to last post
  18. which test is best for me

    Hi, So I have 8 genes and 10 sample (sample size may increase to 40 later).I have a dependent variable and these 8 genes will be my independent...

    Started by suratsiz‎, 03-05-2006 12:07 PM
    • Replies: 1
    • Views: 1,903
    03-05-2006, 01:22 PM Go to last post
  19. Likert scale analysis

    Dear list members, I have developed a questionnaire to find out which aspects of a curriculum are more important and should be given more...

    Started by Humphrey‎, 03-01-2006 05:01 AM
    • Replies: 1
    • Views: 6,496
    03-01-2006, 08:23 AM Go to last post
  20. How to calculate z-Score

    Hello I have huge problem cause i have a test on tuesday and don't know anything about z-scores. Here is the question: Agricultural scientists...

    Started by rubberduck‎, 02-18-2006 05:20 AM
    • Replies: 3
    • Views: 45,636
    02-19-2006, 11:49 AM Go to last post
  21. Help with a language study

    Iím comparing language production of two groups of nonnative speakers. The first group is speakers who learn English without having any contact with...

    Started by Pooh‎, 02-16-2006 10:45 PM
    • Replies: 4
    • Views: 2,303
    02-17-2006, 08:55 PM Go to last post
  22. One-subject categorical frequency data

    Hello all. I hope this is a simple question. Here's the basic idea: On each trial a child gets a choice of 12 types of candy. She can only pick...

    Started by Ben‎, 02-16-2006 08:16 PM
    • Replies: 5
    • Views: 2,400
    02-17-2006, 12:14 PM Go to last post
  23. Cronbach or reliability index

    I just cannot find Cronbach's index in SPSS. Could you tell me how I can obtain the index?

    Started by Susanbwh‎, 02-09-2006 09:21 AM
    • Replies: 4
    • Views: 3,166
    02-10-2006, 04:52 PM Go to last post
  24. Sample Size Help

    Hello: Its been about 9 years since I took my Statistics course, and am hoping you kind souls can provide some guidance. I am evaluating the...

    Started by ebachenh‎, 02-09-2006 05:12 PM
    • Replies: 1
    • Views: 1,747
    02-09-2006, 08:18 PM Go to last post
  25. Latent Class/ Cluster analysis with uncompleted ranking data ...

    Dear all, For my thesis I am looking for more ideas to do the best with uncompeted data sets and using the best software solution for a market...

    Started by Matt23‎, 01-20-2006 12:53 PM
    • Replies: 4
    • Views: 3,157
    02-04-2006, 10:50 PM Go to last post
  26. When to use Z scores

    I am trying to look for significant differences between the test scores of two training programs (two groups undergoing different training, but...

    Started by kowalsks‎, 02-01-2006 08:49 AM
    • Replies: 4
    • Views: 3,320
    02-01-2006, 10:52 AM Go to last post
  27. Help Understanding Repeated Measures Anova

    Hi, I am having trouble understanding a paper I read. The paper used both univariate repeated measures analysis of variance for within subjects...

    Started by Clairemarie63‎, 01-31-2006 03:56 PM
    • Replies: 3
    • Views: 3,409
    02-01-2006, 08:40 AM Go to last post
  28. Unhappy Regarding Bayesian Inference

    Hi, This is a problem I am currently facing in my research... I have a dataset collected over time for time=0 to T I need to estimate some...

    Started by abcd_1641‎, 01-27-2006 10:06 PM
    • Replies: 2
    • Views: 2,489
    01-30-2006, 12:23 AM Go to last post
  29. Rank order data analysis

    I need the appropiate statistic tool to solve the following case: I have done several experiments to 15 subjects. Each subject rank 6 samples...

    Started by verde‎, 01-26-2006 11:35 AM
    • Replies: 3
    • Views: 25,452
    01-26-2006, 02:54 PM Go to last post
  30. Question Determining Sample Size in Natural Populations

    I was wondering how I would determine a sample size for the given scenerio. Please let me know if more information is needed. There is a natural...

    Started by Clairemarie63‎, 01-24-2006 12:54 PM
    • Replies: 5
    • Views: 2,992
    01-25-2006, 11:32 AM Go to last post
  31. Which analysis for categorical repeated design?

    Hello there, I am looking for an appropriate analysis to analyze polytomous categorical data from a repeated mixed design. More specifically:...

    Started by Marc_J_Buehner‎, 11-08-2005 03:14 AM
    • Replies: 5
    • Views: 3,595
    01-23-2006, 03:33 PM Go to last post
  32. Likert Scales

    I am currently doing my research for my dissertation on the under-representation of women in the construction industry. My aim is to show that...

    Started by jdorward‎, 01-21-2006 10:46 AM
    • Replies: 7
    • Views: 4,317
    01-22-2006, 05:57 AM Go to last post
  33. HELP - Greenhouse-Geisser (G-G) correction

    I am attempting to evaluate the data given in a research article. The article is evaluating two treatment groups, and in attempting to show that one...

    Started by kelkat‎, 01-21-2006 02:52 AM
    • Replies: 1
    • Views: 3,881
    01-21-2006, 08:40 AM Go to last post
  34. Three Great Basic Reference Textbooks

    Here are Amazon links to each of the titles. I personally use each of these as desk references: Applied Statistics for the Behavioral Sciences -...

    Started by JohnM‎, 01-20-2006 02:19 AM
    • Replies: 0
    • Views: 1,913
    01-20-2006, 02:19 AM Go to last post
  35. Analysing language test data

    Could somebody help me with interpreting the results of the following survey? I have 25 main respondents in the survey. They are non-native...

    Started by flake‎, 01-17-2006 02:10 AM
    • Replies: 2
    • Views: 2,605
    01-17-2006, 12:27 PM Go to last post
  36. Hypothesis testing for population proportions

    I posted these question a couple of night ago and zi did not get a respond. AS CEO my interested in the relatonsipof funds expended in research and...

    Started by Rojo‎, 01-14-2006 10:23 PM
    • Replies: 1
    • Views: 2,664
    01-14-2006, 11:52 PM Go to last post
  37. Statistical analysis exercises

    Hi all! I am in big trouble. Is there anyone here knowing how to use the statistical analysis programme R? If so, please give me your helping ...

    Started by flake‎, 01-14-2006 03:13 AM
    • Replies: 0
    • Views: 2,403
    01-14-2006, 03:13 AM Go to last post
  38. Appropriate Statistics for Plant Study?

    This post is lengthy, but I hope someone can take the time to look it over and offer some suggestions. Thanks in advance. A colleague has asked...

    Started by jcoleman51‎, 01-13-2006 08:57 AM
    • Replies: 1
    • Views: 2,278
    01-13-2006, 09:08 AM Go to last post
  39. Probability Question

    can anyone help me with this question. a company manufactures computer chips. the machine that makes these disks produces 5% defective chips. the...

    Started by roby‎, 01-13-2006 05:59 AM
    • Replies: 1
    • Views: 2,007
    01-13-2006, 08:54 AM Go to last post
  40. advice on statistics

    I'm a doctoral research student in England, and have conducted both a pilot study and a main study. I've done some statistical analysis already, and...

    Started by jodee_w‎, 01-13-2006 07:10 AM
    • Replies: 2
    • Views: 3,108
    01-13-2006, 08:48 AM Go to last post
  41. KW Test applicable?

    Background: I am new to Statistical Analysis, and I am analysising this data based on a conversation with a old associate over the phone. Am I...

    Started by jscholen‎, 01-04-2006 09:16 PM
    • Replies: 9
    • Views: 3,474
    01-10-2006, 10:03 AM Go to last post
  42. Question Is this pseudo-replication?

    Good morning, I am trying to analyze data from a study that was conducted in 1999-2000. Some of the issues are that 1. I wasn't even working...

    Started by birdlady77‎, 01-09-2006 10:05 AM
    • Replies: 1
    • Views: 4,264
    01-09-2006, 10:28 AM Go to last post
  43. SPSS Project

    Hi there, I was hoping someone could help me. I'm doing a project on promotions at work. I have three variables, scores on a job performance...

    Started by occpsych‎, 01-07-2006 10:05 AM
    • Replies: 2
    • Views: 3,274
    01-08-2006, 08:08 AM Go to last post
  44. Setting decision threshold

    Hi, I am helping my children's school with some data analysis of student exit surveys; the results are provided to the governing council for...

    Started by Stormy‎, 01-02-2006 07:39 AM
    • Replies: 2
    • Views: 2,603
    01-03-2006, 01:29 AM Go to last post
  45. Is this problem appropriate to statistical methodology?

    Hi. First, thanks to Jin for enabling my account and allowing me to post! My question is kind of complex, so I will attempt to reduce it to the...

    Started by JimB‎, 12-29-2005 11:22 AM
    • Replies: 4
    • Views: 2,396
    12-30-2005, 10:55 AM Go to last post
  46. Experimental Design

    Hello, I am not sure whether my experimental design right. Can you suggest me something? and also how many treatments do I have? * all the...

    Started by AlexKom‎, 12-26-2005 07:06 PM
    • Replies: 5
    • Views: 2,612
    12-28-2005, 07:41 PM Go to last post
  47. meta-analysis

    Hi I am supposed to conduct a meta-analysis of 30+ studies regarding specific training programs. The majority of studies use different measures and...

    Started by rach‎, 12-20-2005 12:22 AM
    • Replies: 3
    • Views: 2,807
    12-20-2005, 09:30 PM Go to last post
  48. Unhappy need help with power analysis

    hi boistatisticians I am a medical statistical dummy and a journal editor threats me by asking for a power analysis....can someone help me?

    Started by mierdldoc‎, 12-18-2005 02:13 AM
    • Replies: 1
    • Views: 2,419
    12-18-2005, 08:02 AM Go to last post
  49. need help

    i am currrently enrolled in a masters progam and am completing a reserarch proposal. very weak in stats. I want to measure uncertatinty over...

    Started by rodp‎, 12-11-2005 04:05 AM
    • Replies: 4
    • Views: 2,107
    12-12-2005, 09:44 AM Go to last post
  50. Do I even need a statistical method??

    After rethinking my problem with finding outliers in some GPS/SONAR data i started to wonder if i even need to do a statistical test for outliers at...

    Started by jerryb‎, 12-01-2005 05:40 PM
    • Replies: 7
    • Views: 2,774
    12-08-2005, 12:24 PM Go to last post
  51. Comparison at the 90th percentile

    I have been asked to create a report "Comparing my company with other companies with specific measures." I have a list of the specific measures, I...

    Started by Erenagh‎, 12-05-2005 08:32 PM
    • Replies: 2
    • Views: 3,231
    12-05-2005, 09:29 PM Go to last post
  52. Exclamation ??multi-level/hierarchical or cluster analysis??

    Hi! I hope there's somebody who can help me with my thesis analysis (hierarchical logistic regression). i know the basic concepts and am actually...

    Started by barbi‎, 11-02-2005 09:58 PM
    • Replies: 4
    • Views: 3,747
    12-05-2005, 03:48 AM Go to last post
  53. Question need a method for detecting outliers

    Hi, i just joined this group and hope to find some help. i'll begin with a breif introduction of myself then my question: i am a professor of...

    Started by jerryb‎, 11-24-2005 10:07 PM
    • Replies: 6
    • Views: 3,182
    12-01-2005, 05:31 PM Go to last post
  54. statistics help

    hi guys im currently doing a phd in immunology but kinda helpless and hopless when it comes to stats. is there anyone who can chat to me about which...

    Started by hana-‎, 11-30-2005 05:36 AM
    • Replies: 12
    • Views: 2,953
    11-30-2005, 05:17 PM Go to last post
  55. Help with path analysis

    Hi everyone, I am a clinical psychology student trying to use confirmatory path analysis to determine whether a model using gender (categorical),...

    Started by heddymarie‎, 11-22-2005 05:56 PM
    • Replies: 2
    • Views: 2,570
    11-28-2005, 11:10 AM Go to last post
  56. Question duplex algorithm for data splitting

    Hello, I have problem understand the last step of duplex algorithm. After I have found my othonormal maxtrix, I have found a pair of point that...

    Started by sana307‎, 11-20-2005 04:02 PM
    • Replies: 1
    • Views: 3,651
    11-20-2005, 09:50 PM Go to last post
  57. MSC Project

    Iam doing a project looking at two ways to scan a knee and comparing them against surgery they had prior to the scans however it is only in patients...

    Started by jill‎, 09-10-2005 09:49 AM
    2 Pages
    1 2
    • Replies: 22
    • Views: 5,477
    11-18-2005, 07:37 PM Go to last post
  58. Comparison of Multiple Groups of Data...

    Man, what a killer forum this is. Thanks to those who are providing it... I'm one of those guys who needs brushing up on the fundamentals, and then...

    Started by bubbisthedog‎, 11-17-2005 10:24 AM
    • Replies: 6
    • Views: 2,788
    11-17-2005, 11:39 AM Go to last post
  59. Benchmark Determination...

    Hello, folks, first post. Suppose I have a set of 1000 elements (customers), each with a corresponding value (net profit gained from that...

    Started by bubbisthedog‎, 11-15-2005 04:13 PM
    • Replies: 2
    • Views: 2,077
    11-15-2005, 05:08 PM Go to last post
  60. Data splitting

    Hello all, I am trying to split data into a training data set for regression and a prediction data set to test my regression. I have 130 samples,...

    Started by UofA‎, 11-11-2005 11:20 PM
    • Replies: 0
    • Views: 2,821
    11-11-2005, 11:20 PM Go to last post

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