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# 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: 66,912
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: 197,077
07-16-2014, 11:01 AM
1. ### 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...

• Replies: 2
• Views: 2,159
11-16-2012, 04:01 AM
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...

• Replies: 0
• Views: 1,813
09-02-2007, 03:38 AM
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 ...

• Replies: 1
• Views: 2,592
09-03-2007, 02:50 AM
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...

• Replies: 0
• Views: 2,208
09-02-2007, 03:44 AM
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 ...

• Replies: 0
• Views: 2,692
09-02-2007, 03:46 AM
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...

• Replies: 0
• Views: 3,117
09-02-2007, 03:47 AM
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...

• Replies: 0
• Views: 2,451
09-02-2007, 03:49 AM
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...

• Replies: 0
• Views: 2,118
02-12-2009, 01:44 PM
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

• Replies: 2
• Views: 2,687
03-30-2009, 03:36 PM
10. ### ANOVA's

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

• Replies: 2
• Views: 3,394
10-17-2005, 09:48 PM
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: ...

• Replies: 0
• Views: 2,640
12-29-2011, 12:40 PM
12. ### 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...

• Replies: 2
• Views: 2,520
06-09-2008, 02:11 PM
13. ### 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...

• Replies: 0
• Views: 4,727
03-06-2010, 04:53 PM
14. ### 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...

• Replies: 2
• Views: 2,807
10-30-2006, 03:07 PM
15. ### 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? ...

• Replies: 5
• Views: 2,180
BGM
11-16-2011, 11:58 PM
16. ### 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...

• Replies: 0
• Views: 1,971
02-04-2009, 07:32 PM
17. ### 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...

• Replies: 4
• Views: 2,440
11-01-2008, 03:59 PM
18. ### 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...

• Replies: 1
• Views: 2,503
03-30-2010, 01:05 PM
19. ### 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),...

• Replies: 0
• Views: 2,074
04-27-2010, 06:24 AM
20. ### 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...

• Replies: 3
• Views: 14,662
04-29-2010, 06:05 PM
21. ### 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...

• Replies: 0
• Views: 2,481
09-18-2007, 09:58 AM
22. ### 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...

• Replies: 0
• Views: 1,793
02-09-2009, 11:58 AM
23. ### 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,...

• Replies: 2
• Views: 3,439
12-09-2008, 04:05 PM
24. ### 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....

• Replies: 0
• Views: 2,588
06-03-2009, 08:02 AM
25. ### 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...

• Replies: 0
• Views: 4,249
06-03-2009, 10:15 AM
26. ### 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...

• Replies: 0
• Views: 2,759
06-12-2009, 08:43 AM
27. ### 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...

• Replies: 0
• Views: 2,210
05-05-2010, 09:33 AM
28. ### 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)...

• Replies: 2
• Views: 2,308
03-28-2015, 12:16 PM
29. ### 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...

• Replies: 3
• Views: 2,421
09-05-2011, 08:01 PM
30. ### 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...

• Replies: 0
• Views: 3,450
03-29-2011, 03:06 PM
31. ### 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...

• Replies: 0
• Views: 2,290
05-15-2007, 09:29 AM
32. ### 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...

• Replies: 1
• Views: 1,462
07-27-2012, 01:29 PM
33. ### 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...

• Replies: 8
• Views: 2,995
09-03-2011, 10:23 AM
34. ### 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...

• Replies: 4
• Views: 5,412
10-13-2008, 10:02 AM
35. ### pls help me

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

• Replies: 1
• Views: 1,759
03-11-2008, 04:11 PM
36. ### 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...

• Replies: 0
• Views: 1,197
06-28-2016, 05:11 AM
37. ### 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...

• Replies: 0
• Views: 2,211
05-18-2011, 12:43 AM
38. ### 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...

• Replies: 0
• Views: 2,236
10-30-2007, 08:16 PM
39. ### 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? ...

• Replies: 4
• Views: 2,564
12-13-2012, 01:36 PM
40. ### 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...

• Replies: 0
• Views: 2,504
07-17-2009, 10:05 AM
41. ### 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...

• Replies: 0
• Views: 945
08-05-2014, 06:16 AM
42. ### 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 &...

• Replies: 2
• Views: 1,413
05-18-2014, 09:44 AM
43. ### 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...

• Replies: 1
• Views: 1,970
01-15-2017, 12:36 PM
44. ### 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

• Replies: 1
• Views: 4,570
10-30-2009, 07:54 AM
45. ### 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...

• Replies: 0
• Views: 1,562
12-19-2011, 04:36 PM
46. ### 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...

• Replies: 2
• Views: 2,382
03-05-2014, 03:42 AM
47. ### 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...

• Replies: 3
• Views: 2,178
08-02-2007, 02:46 PM
48. ### 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. ...

• Replies: 0
• Views: 1,479
01-07-2015, 03:35 PM
49. ### 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...

• Replies: 7
• Views: 25,008
11-21-2008, 11:41 AM
50. ### partial correlations

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

• Replies: 0
• Views: 2,807
12-04-2008, 04:20 AM
51. ### 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...

• Replies: 1
• Views: 2,900
03-26-2009, 05:09 AM
52. ### 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...

• Replies: 3
• Views: 9,672
01-17-2007, 05:48 PM
53. ### 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...

• Replies: 2
• Views: 1,474
05-06-2014, 01:28 PM
54. ### 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). ...

• Replies: 1
• Views: 987
05-08-2014, 10:39 AM
55. ### 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...

• Replies: 0
• Views: 2,105
01-23-2013, 01:39 PM
56. ### 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...

• Replies: 0
• Views: 2,840
03-26-2008, 03:48 AM

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