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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: 32,187
    11-10-2005, 12:21 AM Go to last post
  1. Biology/Ecology Statistics

    I have a simple question. I have to statistically analyse data (if its at all possible) comparing two sets of population data on two separate sites...

    Started by tbeatty‎, 08-27-2005 09:52 AM
    • Replies: 1
    • Views: 5,868
    08-27-2005, 10:06 AM Go to last post
  2. Figureing out N's

    Hi I'm measuring the physiological distance that certain axons retract after injury across different injury interval groups. I have approx 5...

    Started by gseif‎, 09-16-2005 02:35 PM
    • Replies: 3
    • Views: 3,763
    09-16-2005, 05:26 PM Go to last post
  3. Question Very Confused

    Hi, I'm new to this forum, but I really need some help here. :confused: I worked all summer on an experiment and I'm not sure what type of...

    Started by Quisty‎, 10-17-2005 06:02 PM
    • Replies: 3
    • Views: 3,833
    10-20-2005, 11:04 AM Go to last post
  4. Post Interpreting means from likert scale data

    Hello, I work for a government department in Australia. The department runs an annual opinion survey with 5 point likert scale response items....

    Started by Adrian Seabrook‎, 10-23-2005 08:13 PM
    • Replies: 4
    • Views: 71,594
    10-24-2005, 08:31 AM Go to last post
  5. Sample size from big industrial runs and batchess

    Dear Folks- I have no knowledge of what is an adequate number of samples to take for an analysis from a total of 20,000 bottles of 1 quart from two...

    Started by donald reinhardt‎, 10-25-2005 01:59 PM
    • Replies: 1
    • Views: 4,970
    10-25-2005, 02:20 PM Go to last post
  6. help with Likert analysis

    I am using 5 point Likert scale questions in questionnaires to measure people's attitudes towards new health technology. Can anyone help with the...

    Started by mcgeemr‎, 11-03-2005 08:06 AM
    • Replies: 3
    • Views: 8,922
    11-03-2005, 10:08 AM Go to last post
  7. Principal component analysis

    Hi I am analysing ecological data for relationships using PCA. Data have been grouped according to signs (-/+) of PC1, 2 and 3 that explained 85% of...

    Started by monkeyman‎, 11-09-2005 02:25 PM
    • Replies: 3
    • Views: 10,084
    11-09-2005, 07:55 PM Go to last post
  8. Question MANOVA of variances?

    I'm trying to figure out how to determine the effect of three (2 binary, 1 categorical) independent variables on the variability of a number of...

    Started by stats_novice‎, 11-10-2005 12:34 PM
    • Replies: 1
    • Views: 8,234
    11-10-2005, 12:47 PM Go to last post
  9. Mortality risk model creation

    Hi there, I have a few questions to throw out there. A bit of back ground. I am starting to build a multiple regression model for looking at the...

    Started by lhcpr‎, 11-10-2005 05:59 PM
    • Replies: 2
    • Views: 4,072
    11-10-2005, 11:03 PM Go to last post
  10. 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: 3,920
    11-11-2005, 11:20 PM Go to last post
  11. 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: 3,363
    11-15-2005, 05:08 PM Go to last post
  12. 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: 4,482
    11-17-2005, 11:39 AM Go to last post
  13. 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: 7,348
    11-18-2005, 07:37 PM Go to last post
  14. 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: 4,649
    11-20-2005, 09:50 PM Go to last post
  15. 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: 3,535
    11-28-2005, 11:10 AM Go to last post
  16. 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: 3,896
    11-30-2005, 05:17 PM Go to last post
  17. 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: 4,320
    12-01-2005, 05:31 PM Go to last post
  18. 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: 5,154
    12-05-2005, 03:48 AM Go to last post
  19. 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: 4,460
    12-05-2005, 09:29 PM Go to last post
  20. 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: 3,695
    12-08-2005, 12:24 PM Go to last post
  21. 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: 2,854
    12-12-2005, 09:44 AM Go to last post
  22. 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: 3,940
    12-18-2005, 08:02 AM Go to last post
  23. 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: 4,664
    12-20-2005, 09:30 PM Go to last post
  24. 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: 4,352
    12-28-2005, 07:41 PM Go to last post
  25. 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: 3,611
    12-30-2005, 10:55 AM Go to last post
  26. 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: 3,977
    01-03-2006, 01:29 AM Go to last post
  27. 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: 4,745
    01-08-2006, 08:08 AM Go to last post
  28. 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: 6,146
    01-09-2006, 10:28 AM Go to last post
  29. 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: 5,176
    01-10-2006, 10:03 AM Go to last post
  30. 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: 4,124
    01-13-2006, 08:48 AM Go to last post
  31. 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: 2,709
    01-13-2006, 08:54 AM Go to last post
  32. 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: 3,421
    01-13-2006, 09:08 AM Go to last post
  33. 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: 3,375
    01-14-2006, 03:13 AM Go to last post
  34. 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: 3,805
    01-14-2006, 11:52 PM 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: 3,855
    01-17-2006, 12:27 PM Go to last post
  36. 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: 2,679
    01-20-2006, 02:19 AM Go to last post
  37. 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: 5,678
    01-21-2006, 08:40 AM Go to last post
  38. 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: 5,886
    01-22-2006, 05:57 AM Go to last post
  39. 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: 4,762
    01-23-2006, 03:33 PM Go to last post
  40. 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: 4,684
    01-25-2006, 11:32 AM Go to last post
  41. 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: 31,128
    01-26-2006, 02:54 PM Go to last post
  42. 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: 4,013
    01-30-2006, 12:23 AM Go to last post
  43. 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: 4,568
    02-01-2006, 08:40 AM Go to last post
  44. 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: 3,901
    02-01-2006, 10:52 AM Go to last post
  45. 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: 5,194
    02-04-2006, 10:50 PM Go to last post
  46. 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: 2,735
    02-09-2006, 08:18 PM Go to last post
  47. 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: 4,370
    02-10-2006, 04:52 PM Go to last post
  48. 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: 3,490
    02-17-2006, 12:14 PM Go to last post
  49. 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: 3,400
    02-17-2006, 08:55 PM Go to last post
  50. 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: 50,204
    02-19-2006, 11:49 AM Go to last post
  51. 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: 8,534
    03-01-2006, 08:23 AM Go to last post
  52. 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: 2,703
    03-05-2006, 01:22 PM Go to last post
  53. 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: 4,788
    03-09-2006, 11:18 AM Go to last post
  54. 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: 8,159
    03-13-2006, 02:01 AM Go to last post
  55. 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: 2,930
    03-16-2006, 08:16 AM Go to last post
  56. 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: 2,764
    03-20-2006, 07:19 PM Go to last post
  57. 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: 3,279
    03-22-2006, 02:01 PM Go to last post
  58. 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: 10,771
    03-23-2006, 09:52 AM Go to last post
  59. 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: 4,191
    03-27-2006, 12:00 PM Go to last post
  60. 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: 8,388
    03-27-2006, 01:35 PM Go to last post

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