1. Announcement:
05-10-2017
Views:
1,817
Page 9 of 294 First 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 59 109 ... Last
Threads 481 to 540 of 17584

# Forum: Statistics

Statistics course and homework discussion. Elementary statistics.

1. ### 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: 66,697
09-30-2005, 09:44 AM
2. ### 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: 196,675
07-16-2014, 11:01 AM
1. ### Homework problem

I need help with part C of this problem. Here is what I have done so far: Suppose that the weights of adult bull mastiffs are normally...

• Replies: 3
• Views: 3,109
07-10-2006, 10:32 AM
2. ### Likert Scale Analysis

Hello all, I am looking to apply a statistical test to some Likert data. My survey responses were scaled 1 to 5 (strongly disagree to strongly...

• Replies: 4
• Views: 50,532
07-11-2006, 12:00 AM
3. ### Hierarchical regression

Hi all, Just have a quick question regarding hierarchical regression. Hypothetical example: DV: happiness IV 1: age (entered in first block)...

• Replies: 0
• Views: 2,558
Nin
07-11-2006, 12:46 AM
4. ### Mahalanobis distance

Hi all, In the table of critical values for Mahalanobis distance, there is "number of variables" and "critical value". My question is, does "number...

• Replies: 0
• Views: 6,080
Nin
07-11-2006, 01:00 AM
5. ### Confidence Interval Help

I am really stumped on this one: In a sample of 400 seeds, 240 germinated. Estimate the true germination rate with a 90% and 99% confidence...

• Replies: 1
• Views: 2,625
07-13-2006, 04:03 PM
6. ### Cronbachs Alpha

Okay, so I'm a student and have to calculate the reliability of a test, I have the test devided into it's various measures - only one (containing 13...

• Replies: 1
• Views: 2,665
07-15-2006, 07:44 PM
7. ### Extracting an elusive sigma

Can anyone help me please? I have a tubular vertical screw-elevator, a new invention! I would like to make some conclusions regarding the...

• Replies: 0
• Views: 2,127
07-18-2006, 04:51 PM
8. ### Q1 and Q3 determination from QD and MEAN

Hi i have a problem. and i m not sure how to solve it. my question is that there are two Quartiles Q1 and Q3, their QD = 12.6 and the mean is...

• Replies: 3
• Views: 3,709
07-19-2006, 06:13 AM
9. ### one sample t test (beta=0)

Hello. I have a dumb question about one sample t test. If I want to test the hypothesis: beta=0 , what is the formula for the t statistic? Is it:...

• Replies: 1
• Views: 6,648
07-22-2006, 04:37 PM
10. ### Is there software that includes post hoc tests for nonparametric data?

Hello all, I have used the Kruskal-Wallis nonparametric test to identify if there are differences among groups. The p-value was 0, meaning there...

• Replies: 0
• Views: 5,494
07-22-2006, 05:01 PM
11. ### 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: 2,710
07-23-2006, 01:27 AM
12. ### 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: 6,668
07-24-2006, 07:00 AM
13. ### 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: 2,556
07-26-2006, 01:14 AM
14. ### 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: 3,147
07-26-2006, 02:27 PM
15. ### 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: 2,661
07-28-2006, 04:58 AM
16. ### 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: 2,495
07-28-2006, 07:09 AM
17. ### 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: 3,111
07-28-2006, 07:15 AM
18. ### 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: 2,833
07-29-2006, 10:46 AM
19. ### 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: 2,241
ron
07-30-2006, 09:45 PM
20. ### 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: 2,416
08-02-2006, 10:29 PM
21. ### 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: 1,697
08-02-2006, 10:37 PM
22. ### 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: 1,878
08-06-2006, 01:50 AM
23. ### 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: 3,368
08-06-2006, 12:50 PM
24. ### 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: 3,216
08-06-2006, 01:08 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: 1,921
08-06-2006, 03:44 PM
26. ### 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: 2,950
08-06-2006, 10:39 PM
27. ### 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: 5,496
08-07-2006, 11:29 AM
28. ### 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: 2,265
08-09-2006, 10:08 AM
29. ### 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: 30,049
08-10-2006, 11:46 PM
30. ### 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: 3,147
08-12-2006, 10:22 AM
31. ### 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: 1,833
08-13-2006, 04:02 PM
32. ### probability calc

• Replies: 0
• Views: 2,274
08-13-2006, 04:22 PM
33. ### 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: 13,064
08-13-2006, 11:48 PM
34. ### 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: 3,301
08-14-2006, 01:08 PM
35. ### 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: 2,964
08-14-2006, 02:15 PM
36. ### 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: 2,689
08-15-2006, 07:56 AM
37. ### 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: 2,920
08-15-2006, 01:52 PM
38. ### 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: 3,407
08-15-2006, 02:43 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: 2,573
08-15-2006, 06:53 PM
40. ### 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: 4,368
08-15-2006, 09:16 PM
41. ### Chi squared or ANOVA for variances analysis

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

• Replies: 6
• Views: 3,714
08-15-2006, 09:54 PM
42. ### 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: 5,463
08-16-2006, 10:10 AM
43. ### 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: 2,279
08-16-2006, 11:36 AM
44. ### 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: 7,652
08-16-2006, 11:59 AM
45. ### 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: 2,315
08-17-2006, 01:35 AM

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: 2,460
08-18-2006, 05:43 AM
47. ### 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: 21,244
08-18-2006, 02:35 PM
48. ### 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: 4,235
08-18-2006, 02:45 PM
49. ### 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: 3,812
08-18-2006, 10:58 PM
50. ### 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: 3,502
08-18-2006, 11:01 PM
51. ### 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: 3,713
08-19-2006, 06:44 AM
52. ### 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: 2,611
08-19-2006, 10:54 AM
53. ### 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: 3,283
08-20-2006, 09:55 PM
54. ### 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: 2,980
08-21-2006, 09:54 AM
55. ### 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: 2,830
08-23-2006, 02:58 PM
56. ### 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: 2,111
08-24-2006, 01:43 AM
57. ### 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: 5,503
08-24-2006, 09:04 AM
58. ### 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: 2,101
08-25-2006, 10:33 AM
59. ### 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: 2,409
08-25-2006, 10:43 AM
60. ### 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: 2,316
08-25-2006, 01:57 PM

Page 9 of 294 First 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 59 109 ... Last

Use this control to limit the display of threads to those newer than the specified time frame.

Allows you to choose the data by which the thread list will be sorted.

Note: when sorting by date, 'descending order' will show the newest results first.