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# Forum: Statistics

Statistics course and homework discussion. Elementary statistics.

1. ### 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...

• Replies: 1
• Views: 196,988
07-16-2014, 11:01 AM
2. ### 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)...

• Replies: 0
• Views: 66,870
09-30-2005, 09:44 AM
1. ### Web Site Page Visit Stats (Relative Popularity)

I've started to create a statistical analysis of relative popularity for visits to the articles on a web site. I'm not a statistician, but have...

• Replies: 0
• Views: 2,240
08-28-2006, 11:32 AM
2. ### writing up output into paragraphs

hi, i have a lot of output from chi square tests and wilcoxon matched pairs. does anybody have any advice how best to write it up - into...

• Replies: 1
• Views: 2,503
08-27-2006, 12:26 PM

:confused: i've just started studing statistics and i want to use the chebychev's therorm, however i'm not sure how can i find the value of the...

• Replies: 1
• Views: 2,326
08-27-2006, 12:21 PM
4. ### T-test or Chi square

Dear Anyone I want to compare two variables with continuous scores (originating from summated likert scales) between two categories. Should I...

• Replies: 2
• Views: 2,671
08-27-2006, 05:58 AM
5. ### I need simple help for a documentary.

Hi, I've search a long time for this place, sure hope I can find some help. I'm doing a feature documentary where three concrete wall samples...

• Replies: 0
• Views: 2,194
08-26-2006, 09:07 PM
6. ### Likert and t-test

Newbie here... I administered 2 surveys, pre and post event using a 1-5 Likert-type scale. I am using the t-Test for correlated measures to...

• Replies: 3
• Views: 4,753
08-25-2006, 07:20 PM
7. ### Sample independence

I have a simple random sample study design in which I randomly selected 1X1 mile sections and around these sections I randomly placed 3 points. At...

• Replies: 0
• Views: 2,850
08-25-2006, 06:28 PM
8. ### symbols symbols symbols

I am in my second stats class and have found that this professor uses different symbols than my previous professor. Example - for the alternative...

• Replies: 0
• Views: 2,867
08-25-2006, 05:23 PM
9. ### analysing nominal data

hi, does anybody have any ideas how to analyse nominal data, which is mixed ie. betwee groups and repeated measures? thanks

• Replies: 0
• Views: 3,169
08-25-2006, 03:24 PM
10. ### Mediated Regression Analysis

Hi everyone, First time posting on here. Greetings from Edinburgh. Would be grateful if someone could explain what a mediated regression with an...

• Replies: 2
• Views: 6,185
08-25-2006, 03:21 PM
11. ### On exploratory research

Hello, My first thread was not that all successful in terms of replies (probably due to my limited knowledge of statistics and consequently a...

• Replies: 2
• Views: 2,326
08-25-2006, 01:57 PM
12. ### Question About Statistical Significance

Greetings, I am currently working on a project where I analyzed a company's client data and I am currently trying to figure out...

• Replies: 1
• Views: 2,424
08-25-2006, 10:43 AM
13. ### I am lost

I have taken fairly well to statistics so far, but I have been totally stumped by this most recent addition to my level of confusion: p-values ...

• Replies: 2
• Views: 2,116
08-25-2006, 10:33 AM
14. ### Using factor analysis to test hypothesis

I have 8 variables (different types of reading material): V1, V2, V3, V4, V5, V6, V7 and V8. According to theory variables V1-V5 should represent one...

• Replies: 1
• Views: 5,530
08-24-2006, 09:04 AM
15. ### how to analyse rank ordering

Hi, I'm not sure the best way to analyse my data. I'm getting people to arrange a list of terms from most.. to least.. I can calculate the mean...

• Replies: 0
• Views: 2,119
08-24-2006, 01:43 AM
16. ### SD of an average

I have a statistics question, relevant to an engineering project. A quantity was measured N times, with an average of A and a standard deviation...

• Replies: 1
• Views: 2,850
08-23-2006, 02:58 PM
17. ### Moving average

Hi, I am looking for a way to test de difference between two moving average. I want to know if the moving average at time t is equal or not to the...

• Replies: 0
• Views: 3,008
08-21-2006, 09:54 AM
18. ### power calc with coeff of variation

Dear all, I am a neuroimager and I measure the levels of different chemicals in the brain. We did a test-retest study on our measures (10 subjects...

• Replies: 2
• Views: 3,304
08-20-2006, 09:55 PM
19. ### In desperate need of help

:confused: Hello everyone! I am in dire need of help with my statistics, about which I know little. Assistance is needed to help me complete a...

• Replies: 0
• Views: 2,641
08-19-2006, 10:54 AM
20. ### Can anyone help me with this Spearman test?

Hi everyone I am doing a Spearman correlation as part of a university project and wondered if anyone can help me with it please? I have to find a...

• Replies: 0
• Views: 3,749
08-19-2006, 06:44 AM
21. ### Correct statistical test to use

I'm a stats & SPSS novice, and I'm trying to think through a statistical testing question I have. Part of this involves using SPSS, so I apologize in...

• Replies: 2
• Views: 3,526
08-18-2006, 11:01 PM
22. ### ANOVA - Main effects and interactions

I have a question about ANOVA main effects and interactions. If my main effects are not significant, can I go ahead and make any sense out of...

• Replies: 4
• Views: 3,851
08-18-2006, 10:58 PM
23. ### Mann Whitney U Test problem

Hi! I have worked out Mann Whitney U Tests by hand, and afterwards checked them on internet computer programmes, except that one of them doesn't...

• Replies: 0
• Views: 4,242
08-18-2006, 02:45 PM
24. ### How to convert ordinal into interval?

Hi all, i'm a new member here.. I have a problem, right now i'm on my undergraduate thesis, my thesis is about the relation between internal audit...

• Replies: 4
• Views: 21,331
08-18-2006, 02:35 PM

Hi all Can I get some help from you, I am a research student I developed questionnaire to get some information but after I get the results I am...

• Replies: 2
• Views: 2,475
08-18-2006, 05:43 AM
26. ### My brain hurts- confidence intervals

I have probably been looking at this problem for too long- it is just a sample problem, not part of an assignment, but I am so stuck! I seem to be...

• Replies: 3
• Views: 2,327
08-17-2006, 01:35 AM
27. ### Comparing groups - z-scores

I have two groups A and B. Each subject has provided scores on a number of tests, and I want to give each subject an overall score based on these...

• Replies: 2
• Views: 7,704
08-16-2006, 11:59 AM
28. ### Need help in analysis

Hi....All stats gurus ....kindly help me with this I have data from 12 patients, and we have measured 5 hemodynamic variables ( Systolic Blood...

• Replies: 3
• Views: 2,302
08-16-2006, 11:36 AM
29. ### NASA TLX analysis?!?

Hi folks -please has anyone got any advice on how to analyse NASA Task Load Index (TLX) data? Some people treat it loosely as interval data and...

• Replies: 0
• Views: 5,502
08-16-2006, 10:10 AM
30. ### Chi squared or ANOVA for variances analysis

Which is a better method for testing of variances? Chi squared or ANOVA?

• Replies: 6
• Views: 3,728
08-15-2006, 09:54 PM
31. ### determine sample size using confidence interval?

Hi all, I've just started learning stats. Need help on some questions that I dont quite really understand just by reading the book. How do I...

• Replies: 1
• Views: 4,388
08-15-2006, 09:16 PM

Sorry if this is in the wrong place. Is the Shannon-Weaver Diversity Index even a statistical test? I don't know......... I think I need to apply...

• Replies: 0
• Views: 2,590
08-15-2006, 06:53 PM
33. ### Minimum Sample Size required

Hi everyone, I was wondering if you can help me track down an answer I should probably already know how to find. Assuming I take 1000 calls in a...

• Replies: 0
• Views: 3,432
08-15-2006, 02:43 PM
34. ### chi-square goodness-of-fit test

I have a question regarding the chi-square goodness-of-fit test: A manager is reviewing information from his five stores and gets the following...

• Replies: 1
• Views: 2,943
08-15-2006, 01:52 PM
35. ### normal distribution help

A worker earns \$15 per hr at a plant and is told that only 2.5% of all workers make a higher wage. If the wage is assumed to be normally distributed...

• Replies: 3
• Views: 2,703
08-15-2006, 07:56 AM
36. ### logistic regression

I am using JMP to do a nominal logistic regression analysis. Even though JMP provides me with an output model, the parameter estimates are all...

• Replies: 0
• Views: 3,005
08-14-2006, 02:15 PM
37. ### Central tendancy measure for broadband internet speeds

I have collected over 120 observations of broadband internet speeds achieved through my service provider. The values range from, 5 kilobits per sec....

• Replies: 0
• Views: 3,318
08-14-2006, 01:08 PM
38. ### Critical t value with .04 significance level

The problem I am working on tests a claim with a significance level of .04 and it's a left-tailed test with degrees of freedom at 84. In my...

• Replies: 4
• Views: 13,098
08-13-2006, 11:48 PM
39. ### probability calc

• Replies: 0
• Views: 2,327
08-13-2006, 04:22 PM
40. ### A Simple Survey -- Critique Me!

Hi everyone! First time poster here! :wave: I'm designing a survey for my small business -- but unfortunately, I know very little about...

• Replies: 0
• Views: 1,847
08-13-2006, 04:02 PM
41. ### Value-at-Risk of a distribution?

Hi, I have returns data for 2 assets for a 10 year period. I want to determine the Value-at-Risk for the distribution of this data. I have...

• Replies: 2
• Views: 3,173
08-12-2006, 10:22 AM
42. ### Z-score for Skewness and Kurtosis

Hi, I have a sample of data (about a hundred numbers) and I would like to roughly estimate whether they follow a normal distribution or not. From...

• Replies: 3
• Views: 30,185
08-10-2006, 11:46 PM
43. ### optimal blending of 3 models

I have 3 models that have produced losses based on historical industry-wide mix of business (property) and particular clients mix of business...

• Replies: 0
• Views: 2,287
08-09-2006, 10:08 AM
44. ### Partial point biserial correlation anyone?

Hi! Is there such a thing as a partial point biserial correlation and if so, is it preferable to use this instead of conducting an ANCOVA when...

• Replies: 0
• Views: 5,543
08-07-2006, 11:29 AM
45. ### Transformation of variables...Need help pls!

Please could someone tell me if i have the right answer and correct it if need be Q: Suppose X is uniformally distributed on [0,pi), and a new...

• Replies: 5
• Views: 2,978
08-06-2006, 10:39 PM

I am a little confused about nested design and block design. Please see following example, how do you think? It is a block design or nested? Six...

• Replies: 0
• Views: 1,932
08-06-2006, 03:44 PM
47. ### Probit Analysis

Hi everybody! I am new in your forum and I have a question for you. I hope you will be able to help me solve my problem. I am trying to estimate...

• Replies: 1
• Views: 3,233
08-06-2006, 01:08 PM
48. ### Tests for secular trend...am I on the right track?

Hi- This is not homework, but a project rather for both my work and graduate program. I collected data from a large outpatient clinic in my area...

• Replies: 1
• Views: 3,387
08-06-2006, 12:50 PM
49. ### Parametric Analysis help!

Hey there have a problem question: I'm producing 2 types of jackets short and long. 2 types of work done on them, cutting & sewing. Cutting...

• Replies: 0
• Views: 1,886
08-06-2006, 01:50 AM
50. ### Statistics for prescriptions...

Ok... I am working for a National Wildlife Refuge in Arkansas and am needing some help with some statistical work. I have an equation out of a...

• Replies: 1
• Views: 1,704
08-02-2006, 10:37 PM
51. ### Assuming Normal distribution

I have some data, and i need to assume that its is distributed both with a normal and student-t distribution. How do I do that? thanks

• Replies: 1
• Views: 2,424
08-02-2006, 10:29 PM
52. ### Chi square test procedure in SAS

Hi does anybody know the appropiate proc for a chi square test in SAS program. Would it be possible to include blocks in the model statement? thanks

• Replies: 0
• Views: 2,251
ron
07-30-2006, 09:45 PM
53. ### binary spatial data

Hi, Just working on an environmental project about vegetation mapping. I've got a regular grid of points with percentage of plants for each...

• Replies: 0
• Views: 2,854
07-29-2006, 10:46 AM
54. ### ANOVA and sig. question

I have a question about ANOVA and statistical significance. I have a 18 question Likert style survey, with about 400 replies. I am analysing...

• Replies: 3
• Views: 3,126
07-28-2006, 07:15 AM
55. ### t test or ANOVA or both???

Hey Everyone, I'm a Newby who has just joined this forum and already I have a question for you all. I'm wondering which analysis to conduct......

• Replies: 4
• Views: 2,513
07-28-2006, 07:09 AM
56. ### Adjusting regression for finite populations

I have a sample of 150 from a population of 300, so when deciding whether a variable is significant in a regression I need to use a finite population...

• Replies: 0
• Views: 2,679
07-28-2006, 04:58 AM
57. ### Comparing multiple subject groups

Hi all! I have a question regarding the analysis of some of my dissertation data. Briefly, I have data for a number of biomechanical variables...

• Replies: 0
• Views: 3,169
07-26-2006, 02:27 PM
58. ### exam review HELP!!!

The question is: Mr. Brown recently purchased 100 randomly selected machine scres with a defective rate of 10%. What is the probability that he...

• Replies: 0
• Views: 2,570
07-26-2006, 01:14 AM
59. ### Chi-squared Goodness of Fit Questions

Hi folks, A request for some basic help with Chi-squared testing: Say we have two different Likert samples (strongly agree, agree, neutral,...

• Replies: 5
• Views: 6,734
07-24-2006, 07:00 AM
60. ### Confused about my data file

I have conducted a pilot study on two individuals (Likert data). These individuals completed a survey, every three days for 8 weeks. Their data looks...

• Replies: 4
• Views: 2,730
07-23-2006, 01:27 AM

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