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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: 197,161
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: 66,946
09-30-2005, 09:44 AM
1. ### Additional Exercise for the book - A Course in Large Sample Theory" by Ferguson.

The link is: http://www.math.ucla.edu/%7Etom/LST/lst.html I need help in solving some problems in section 5, 8, and 14. Does anyone have the...

• Replies: 0
• Views: 2,536
05-06-2007, 07:33 PM

Hi, I'm doing some revision and can normalise Qbar easily in the multiplicative case, but when using additive it goes wrong. So after working out...

• Replies: 3
• Views: 4,449
01-14-2009, 06:43 AM
3. ### Additive effect, how to calculate?

Dear users, I hope you have some good ideas about the following Medical dilemma. I'm conducting a study about Three drugs, A + B + C. Drug A...

• Replies: 13
• Views: 4,471
11-19-2014, 04:04 PM

Forgive me for the title, I don’t know the jargon :) Simply, I am playing a war game online which uses stats to help calculate damage to an...

• Replies: 1
• Views: 2,255
BGM
02-29-2012, 07:07 AM
5. ### Additivity of sums of squares in ANOVA

Hello-i have a question (not a homework...but more logical one) For balanced design (where there are equal number of observation in each row/column)...

• Replies: 1
• Views: 1,741
nyo
10-29-2012, 08:56 AM
6. ### Address whether one overlap is significantly bigger that of another related overlap

I could really use a hit as to which statistical test I need to use to address the following problem: I have three different species: A, B and C....

• Replies: 0
• Views: 1,707
09-30-2013, 06:25 AM
7. ### Addressing intraclass correlation coefficient issues

ICC estimates changes according to the magnitude of the data. If the data are >1, ICC values are going to be way closer to 1 than if the data are...

• Replies: 0
• Views: 1,566
agp
03-17-2013, 04:28 PM

I am hoping someone can help me resolve a questions around survey data and what is an adequate response rate. I am surveying customers who take...

• Replies: 0
• Views: 1,707
08-04-2008, 02:09 PM
9. ### Adequation test on continuous distribution

Hey guys, I am working on R with returns from an index. I concluded that they are not normal. I now was trying to find what distribution they...

• Replies: 1
• Views: 1,536
08-08-2012, 11:14 PM
10. ### Adj-r2 from two models and the significance of the difference

Hi there, I have ran two linear regression models. I have extracted the adj-r2 from each. What I want to know if whether the average increase from...

• Replies: 4
• Views: 6,088
07-08-2013, 09:00 PM
11. ### Adjust Wald Test for Type 1 Error

Hello All, I am running regression models with a polytomous dummy variable predictor (3 category) in Mplus. I am able to use Wald tests of...

• Replies: 0
• Views: 728
07-15-2014, 12:00 PM
12. ### Adjusted Beta from Multiple Logistic Regression vs Mantael Haenszel

Hi all, I was wondering if I should expect the same OR from multiple logistic regression vs. the Mantael Haenszel from a 2x2 table and why. All...

• Replies: 2
• Views: 1,273
05-19-2013, 09:18 PM
13. ### Adjusted Closing Price on stock sites - independant or not?

Adjusted Closing Price as data; If I use these as data points, should I consider it independent or not? Definition of 'Adjusted Closing Price': A...

• Replies: 0
• Views: 1,213
01-21-2012, 12:46 PM
14. ### Adjusted principal component analysis

Hi, I was wondering if it is possible to perform an age adjusted principal component analysis just like it is done for linear regression (finding...

• Replies: 2
• Views: 2,516
10-20-2011, 05:27 PM
15. ### Adjusted R squared interpretation

I've always had the adjusted R squared interpretation explained to me in the following way (quoted from wikipedia) Adjusted R2 is a modification...

• Replies: 1
• Views: 118,509
07-03-2009, 12:51 PM

I’ve just picked up my thesis from a 3 year hiatus so things are (more than) a little rusty. I need some help with interpreting adjusted R squares. ...

• Replies: 4
• Views: 14,607
03-26-2011, 09:35 AM
17. ### adjusted residuals or standardized residuals?

Hi, I am performing chi-square analyses for my dissertation data and am wondering about appropriate "post-hoc" analyses when chi-square values are...

• Replies: 2
• Views: 15,155
06-27-2006, 03:58 PM

Hello everyone! I am new here. I would be over the moon (!) if someone could help me crack this, probably a minor, problem that I have.. I...

• Replies: 0
• Views: 4,358
04-23-2009, 11:21 AM
19. ### Adjusting expected variance of a time series for autocovariance

The question i have is simply how to correctly adjust expected variance of a time series for autocovariance. Example: You have a time series of...

• Replies: 0
• Views: 3,456
10-20-2008, 06:05 PM
20. ### Adjusting for covariates in correlation test

Hi, I wonder if it is possible to adjust for covariates when we use PROC CORR (correlation test) in SAS. Thanks!

• Replies: 4
• Views: 1,486
06-22-2017, 02:26 PM
21. ### Adjusting means for different sample sizes

Hello, I have calculated the mean score for several variables. Because there is a big difference in the number of respondents for each variable it...

• Replies: 3
• Views: 1,700
08-11-2014, 03:49 PM
22. ### adjusting p value for familywise error rate

I have conducted a MANOVA for a data set and have found interactions. I explored the interaction with ANOVA and then t tests. What are the...

• Replies: 4
• Views: 2,038
10-02-2013, 08:14 AM
23. ### 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: 2,695
07-28-2006, 04:58 AM
24. ### Adjustment for multiple comparisons

Hi there I am hoping you can help me out with a confusing topic. I have a 2x3x4 repeated measured anova. I have a significant 3-way interaction,...

• Replies: 5
• Views: 3,014
04-05-2014, 04:17 AM
25. ### adjustment for multiple comparisons in meta-analysis

I wrote a meta-analysis on the use of two different drug regimens on the symptoms associated to endometriosis. Four papers were included in the...

• Replies: 5
• Views: 1,884
07-12-2015, 11:59 AM
26. ### Adressing endogeneity in panel count models

• Replies: 0
• Views: 1,042
06-29-2015, 01:39 PM
27. ### Advanced Stat's Help Needed!!!

I'm doing statistics as part of my Maths module. And I'm having problems completing a question's within an an upcoming assignment. Any help would be...

• Replies: 3
• Views: 3,265
02-23-2011, 03:11 PM
28. ### Advanced Statistics course questions

Hi guys, I was having trouble solving these exercises and i was hoping someone could provide me with guidance. Exercise: 1)Prove that T^2 ~...

• Replies: 1
• Views: 2,293
02-10-2012, 09:48 PM

Hi all, ive been looking at a quetion that says "What is the correlation coefficient, what information does it provide about the way two variables...

• Replies: 1
• Views: 87,521
08-18-2008, 08:38 AM
30. ### Advantages of Structural Equation Models

I have been asked to justify SEM as generating useful information not available through regression. Its important because we have to appeal a policy,...

• Replies: 2
• Views: 2,655
01-29-2013, 01:17 PM
31. ### Advantages to using Ratios

• Replies: 2
• Views: 6,254
03-15-2009, 10:19 AM

Did I do this correct? Before an intensive TV advertising campaign, the producers of Nike athletic shoes find that 29 of a random sample of 200...

• Replies: 1
• Views: 4,860
01-17-2006, 01:00 AM
33. ### Advice (Failure count stats)

Afternoon all, if you were presented with a dataset which contained failure counts for a piece of machinery split into months how would you go...

• Replies: 1
• Views: 1,911
08-07-2014, 03:39 AM

I have 3 regression models; my error/constant values are 3***, 1.2 and 3.4***. My question is: since the 1.2 is insignificant (so this model...

• Replies: 0
• Views: 2,257
04-20-2010, 10:19 AM
35. ### advice for non-parametric MANOVA test?

Hi, I'm looking for some advice as to which test to use to analyse my data. I would like to test for differences in bivariate distribution...

• Replies: 0
• Views: 1,661
02-08-2012, 02:10 PM
36. ### Advice needed on appropriate statistical test

Hi there. Thanks for taking the time to read this post. I have recently become unstuck trying to statistically analyze some new data. ...

• Replies: 0
• Views: 966
09-03-2012, 08:07 AM
37. ### advice needed on selecting appropriate test

Hi, can anyone help? I surveyed 65 consumers and asked them to rate different motivational factors which influenced local food purchases ...

• Replies: 0
• Views: 2,201
08-02-2010, 11:26 AM
38. ### Advice Needed: Multi-Response Question & One- or Two-Tailed Test

In a particular question, respondents were able to select as many response options as apply to them; hence, the sum of the proportions for all...

• Replies: 1
• Views: 1,294
10-22-2013, 03:04 PM
39. ### Advice on an average math student going to grad school for statistics

Greetings, I ran into this forum when trying to look for some nice probably problems.I found out this is a really cool place to talk about stats, so...

• Replies: 2
• Views: 7,535
12-11-2008, 04:40 PM
40. ### advice on analysis of quanititative data

Hi guys, I apologise if this sounds naive. I'm currently doing a data analysis for a survey I have carried out, its basically about whether...

• Replies: 2
• Views: 2,613
04-04-2011, 02:31 PM
41. ### Advice on best method of analysis

Hi all, I have a problem and I need some advice as to the best way to approach it. This is a real life problem, not for a course or anything. I'm...

• Replies: 4
• Views: 2,606
12-20-2013, 10:36 AM
42. ### Advice on comparative analysis between two groups on Likert scale questionnaire

Hi everyone, I'm stuck on my dissertation which is due next week. I'm a business major student and my project is a comparative research on corporate...

• Replies: 0
• Views: 1,415
06-02-2012, 08:05 AM
43. ### Advice on how to tackle these questions / Which methods to use

Hi - Could I get some advice of which type of statistics I should use to represent my data on the best possible way? I have 76 participants with...

• Replies: 0
• Views: 1,343
04-19-2016, 07:18 AM
44. ### Advice on type of test to use

Hi guys. I have performed a study looking a 2 groups of people and how a particular blood test may be related to a disease. My two groups are 1)...

• Replies: 1
• Views: 2,392
12-15-2006, 06:31 PM

Hi I'm studying the effect of different music styles on performance tasks. I'm considering a mixed ANOVA analysis, but I'm not very confident...

• Replies: 3
• Views: 2,340
01-19-2017, 02:15 PM
46. ### Advice to improve Monte Carlo Simulation (Uncertainty Analysis)

Hello! Can anyone suggest me any method or technique to improve Monte Carlo Simulation (Sampling Method) on Uncertainty Analysis? Thanks! ~~

• Replies: 2
• Views: 1,628
03-14-2012, 04:20 AM

Hi all first post from a complete statistics-phobe, I'm just looking for a little advice pointing in the right direction. I'm a first year teacher...

• Replies: 2
• Views: 1,307
04-09-2013, 04:40 PM
48. ### advise me on my data analysis: chi-square goodness of fit / pooling data

Hi, I'm new to the forum but have a feeling i'll be hanging around quite a bit now that I found you all! :wave: I have biological data that I...

• Replies: 0
• Views: 6,041
04-04-2010, 08:14 PM
49. ### Advise on best statistical test.

Hi all I have some ratios which differ seasonally. I want to determine if the ratios are significantly different but im not sure which test to...

• Replies: 1
• Views: 2,015
03-13-2012, 09:47 AM
50. ### Affirmation of Analysis Write-up

Hi all, I am new to this forum and looking for somebody with statistical experience to affirm the write up of my results. I completely understand...

• Replies: 9
• Views: 1,529
02-24-2016, 03:37 PM
51. ### After a significant MANOVA, is the next proper step to run univariate ANOVAs?

So I've heard both sides of this and am curious what you guys think. Some sources that I have read have said that after a significant MANOVA, you...

• Replies: 0
• Views: 929
12-06-2015, 07:51 PM
52. ### Again with the 68-95-99.7 rule

If I have normally distribued test scores with a mean of 100 and a standard deviation of 20: Percentage scores greater than 120 would be....16%?...

• Replies: 2
• Views: 3,587
09-28-2010, 09:09 AM

Hi Guys, Noob here. But i have this problem. I have a dataset with two different classification bands of age group and corresponding data. is...

• Replies: 0
• Views: 952
07-24-2013, 06:53 PM
54. ### age and Mann-Whitney test

urgent question, i have the age variable not normaly ditrrebuted and i wanted to explore its association with the outcome (not case , case) at...

• Replies: 1
• Views: 3,988
08-26-2010, 09:50 AM
55. ### Age as a Dependent variable in 2-way ANOVA?

Hi, I have a dataset comprising of Ages and Genders of patients in two WardUnits. I want to determine if patient Ages differ by WardUnit and...

• Replies: 9
• Views: 2,644
09-05-2014, 10:33 AM
56. ### age distribution - obtaining sample accuracy with unevenly populated dataset

Hi. I'm working on a university research project and want to analyse a dataset but have zero statistics training. The dataset is of several thousand...

• Replies: 0
• Views: 1,409
09-02-2013, 08:49 AM

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