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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: 196,759
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: 66,758
09-30-2005, 09:44 AM
1. ### 1 tailed vs. 2 tailed p-values

I have been encountering some discussion lately on 1 vs. 2 tailed p-values. The 1 tailed test it seems is not preferred even with an a priori...

• Replies: 2
• Views: 4,797
08-12-2011, 01:04 AM
2. ### 1 X 2 Chi Square? With controlled expected values?

Good Morning, I’m wondering if you could possibly help me with a little problem. I have some data: 1. Number and date of disease outbreak...

• Replies: 2
• Views: 1,679
01-14-2016, 09:34 AM
3. ### 1-PropZTest conditions?

I am doing a test on skittles to see if the proportion of red skittles the company makes is truly 20%. To do this, I randomly took 10 bags of...

• Replies: 1
• Views: 3,624
05-20-2010, 06:36 PM
4. ### 1-sample binomial for my research data?

Hi, Newbie here so I will try to explain as clearly as I can. I do research in the neuro field. I have a control group of neurons that I am...

• Replies: 1
• Views: 1,297
10-11-2016, 12:16 AM
5. ### 1-Tailed Levene Test

I am interested in testing if the variance of one data set is bigger than another set. I thought about using a simple F-test, but I am not sure the...

• Replies: 5
• Views: 5,104
09-17-2011, 12:34 PM
6. ### 1-way ANOVA help

So i have some readings I'm need to do 1-way ANOVA, but i need to asses the normality - the prof said its ok to just use Q-Q plots to do this...

• Replies: 1
• Views: 1,672
03-11-2008, 04:00 PM
7. ### 101 Homework Linear Regression Analysis

When I'm asked to determine a linear regression model equation to represent data, am I being asked to create a graph? or enter the Y=25.326x + 353.16...

• Replies: 0
• Views: 2,038
05-07-2014, 08:36 PM
8. ### 11 standard deviations

Hello. I am new here...my first post. Anyway, last week in the stock market the financials rallied ~13%. I read that this is 11 standard...

• Replies: 0
• Views: 5,333
07-21-2008, 01:42 PM
9. ### Poll: 11-point DV. Linear or Ordinal Regression?

Hi y'all, I've got a survey of twenty (dichotomous) questions, and one 11-point scale question. The 11-point scale question is scored 0-10, and...

• Replies: 4
• Views: 3,070
01-18-2008, 03:09 AM
10. ### 12 years old. Expected value help please?

Hi I'm just getting started with this topic and am stuck. X follows a continuous uniform distribution on . Find E. K is a integer. I got θ as...

• Replies: 1
• Views: 1,366
10-09-2013, 08:42 PM
11. ### 15 Likert scale questions: How do I find the mean, median and mode?

Please Help! I need to find the mean the median and the mode and also use a t test to interpret my results between females and males in mate...

• Replies: 11
• Views: 14,400
12-18-2012, 03:03 AM
12. ### 2 (Easy) Regression Questions

Hi guys. I just joined Talk Stats. So I recently just returned to school after being hit by Crohns' Disease for a year, and I was wondering if you...

• Replies: 0
• Views: 3,072
05-24-2014, 09:38 PM
13. ### 2 ANOVA related questions

Hello, I've been stuck on these two practice questions for the last few hours. My professor said that this section is important for our midterm...

• Replies: 1
• Views: 3,265
03-22-2010, 01:59 PM
14. ### 2 Coops and Chickens problem

Hi, I have a question as homework to solve, but although it's so easy (as everyone says) I am not still able to solve it. Could you please help me...

• Replies: 4
• Views: 1,814
05-05-2014, 10:20 PM
15. ### 2 Different Population sizes - ED Visits

Hi, I have data from last year on Emergency Department Visits to an Urban Hospital. I would like to compare the impact of the type of primary...

• Replies: 1
• Views: 1,571
03-26-2013, 06:44 PM
16. ### 2 eyes --> One problem

Hi all! I am an optometrist doctorandum student in Madrid. I am comparing vision of people with a strange disease afecting eyes and normal people. ...

• Replies: 7
• Views: 3,742
03-31-2011, 04:47 PM
17. ### 2 groups with ratio(s); How to test between-/within-group differences?

Hi statistics community I am wondering if anyone could please give me advice on my rather simple (I assume) statistical problem. I am working...

• Replies: 9
• Views: 3,288
08-31-2012, 02:38 PM
18. ### 2 Independant Groups analysis HELP

Hi, I'm conducting a study looking at the effects of hypnosis on performance anxiety and golf putting scores. I have 2 groups (Hypnosis and Control)...

• Replies: 2
• Views: 1,680
03-16-2012, 09:41 AM
19. ### 2 independent categorical variables. What test do I use?

Sorry if this has been asked before, if it has I couldn't find it. Also excuse me if I mix up terms, I'm a bit of a novice. My experiment had two...

• Replies: 5
• Views: 2,059
03-11-2014, 03:09 PM
20. ### 2 independent groups - compare results of questionnaire

Hi Guys, I am working on a project at work which has nothing to do with statistics, but as a small part of it I need to compare results of...

• Replies: 1
• Views: 1,011
05-04-2014, 03:31 PM
21. ### 2 IV outcomes and 3 predictors?!

I have a study investigating the impact congestion charging will have on travel behaviour. Outcomes: 1. Public Transport Use 2. Non-Public...

• Replies: 2
• Views: 2,764
11-03-2008, 05:33 PM
22. ### 2 IV's & Several DV's

Hi I have 2 distinct groups, smokers and nonsmokers. I'm comparing their behavoural flexibilty, cognitve flexibility and habitual behaviour. ...

• Replies: 7
• Views: 3,785
08-08-2008, 11:44 AM
23. ### 2 or more DV in the regression

Hello, I have 3 DV's and 10 IV's. I want to know for each dependent variable separately by which independent variable it is affected most? what...

• Replies: 0
• Views: 925
04-04-2013, 01:32 AM
24. ### 2 populations of non-dichotomous proportion data?

Hi there, I am wondering if anyone here could help me with this data. What I have is data from two independent populations (two different types of...

• Replies: 1
• Views: 3,625
05-13-2008, 03:46 AM
25. ### 2 problems

The owner of a restaurant that serves continental food wants to study characteristics of customers of his restaurant. In particular, he decides to...

• Replies: 2
• Views: 4,953
08-23-2008, 09:57 AM
26. ### 2 Problems - HELP!!!

:confused: new to this whole stats thing , and ive been going over these 2 questions for ages and cant come to a conclusion , someone plz help ,...

• Replies: 0
• Views: 2,363
06-02-2006, 03:13 AM
27. ### 2 problems I can't figure out 1% and 5% significance level

two problems that my classmate and I can't figure out...maybe you can help! A health club manager claims that members lose an average of 15 pounds...

• Replies: 4
• Views: 4,454
12-18-2007, 06:08 PM
28. ### 2 Questions on quality improvement

Q1. My p-chart from data below saw that the process is out of control. What should a team do now regarding this data?

• Replies: 10
• Views: 1,930
12-08-2011, 05:02 PM
29. ### 2 questions: dice problem and hypergeometric problem

The problem is: Suppose the Braves and the Indians meet again the World Series. Assume that the probability that the Braves win a game is 0.55;...

• Replies: 2
• Views: 1,424
10-24-2013, 02:39 PM
30. ### 2 Sample Distribute

ROA is an indicator how profitable a company Is relative to its assets. Note: I know I haven't given the dataset.

• Replies: 1
• Views: 197
09-22-2017, 06:17 PM
31. ### 2 sample proportion test

Carrefour wanted to find the percentage of sales at two such stores in city A and city B for which at least one of the item was returned. A sample of...

• Replies: 0
• Views: 1,314
12-31-2013, 09:43 PM
32. ### 2 Sample T Test for Nonnormal data

Hi everyone! I work in the advertising industry and I am in the process of creating a t test calculator. The calculator will be used to test the...

• Replies: 0
• Views: 1,286
04-05-2013, 02:32 PM
33. ### 2 separate models to look at variates plus interactions or only one model needed?

Hello, any guidance would be much appreciated! I'm running a multivariable analysis using Proc GLM. My dependent variable is continuous, while all...

• Replies: 2
• Views: 1,986
08-14-2012, 08:43 AM
34. ### 2 short questions

1) is quadratic or cubic relationship a non linear relationship? 2) Do I always have to calculate the sample size for analysis? e.g. if required...

• Replies: 4
• Views: 2,055
09-04-2009, 02:56 AM
35. ### 2 standard deviations above and below the mean?

Hello, and HELP!! My professor has given us a range of numbers in excel, and is asking for "one standard deviation above and below the mean, and 2...

• Replies: 2
• Views: 6,670
04-16-2012, 08:41 AM
36. ### 2 stat problems

1) The average size of insurance claims processed by Good-Wish Insurance Company for the month of August is \$710. If you assume that the population...

• Replies: 1
• Views: 1,985
04-19-2008, 01:27 PM
37. ### 2 step questions and how to model them

A common set of items in large government funded databases like PISA and TIMSS are two stage questions. For example I have a set of items from the...

• Replies: 3
• Views: 1,413
08-07-2013, 02:45 AM
38. ### 2 Tail Hypothesis

A shopper felt that there was no difference between the price of Ever ready batteries and DuraCell batteries. To test her claim she checked the...

• Replies: 0
• Views: 2,501
11-26-2006, 09:49 PM
39. ### 2 way and 3 way interaction

Can anyone explain why a two way interaction only becomes significant when a third factor is introduced. For eg. Time*Treatment ns p=0.2...

• Replies: 0
• Views: 1,607
02-12-2017, 08:50 PM
40. ### 2 way anova

Dear SPSS thinkers, I have a case with one dependent variable ( image of a product) and two independent variables, gender and age. My problem lies...

• Replies: 0
• Views: 1,334
06-06-2013, 05:01 AM
41. ### 2 Way ANOVA

I'm trying to get an understanding of 2 way ANOVA and how I interpret the results. I found a sample problem and managed to figure out how to enter...

• Replies: 1
• Views: 2,550
01-20-2014, 08:09 AM
42. ### 2 way ANOVA and mediation

Hi i'm doing a 2( game type: violent and non-violent) x 2(parenting type: strict and consultative) two way ANOVA to assess their effect on...

• Replies: 0
• Views: 3,562
10-28-2013, 08:03 AM
43. ### 2 Way ANOVA or lots of T-tests!!! Just cant get my head round it!!!!

Hi everyone, I really cant get my head round which test i am supposed to use and every time i think i have it sorted in my head, i change my mind,...

• Replies: 1
• Views: 2,484
05-31-2007, 11:41 AM
44. ### 2 way ANOVA post hoc tests SPSS

:wave:I have been using 2 way ANOVAs SPSS in base 15.0 to look at the effect of two fixed factors (treatment and brain region) on a dependent...

• Replies: 4
• Views: 10,516
05-14-2013, 02:53 PM
45. ### 2 way ANOVA posthoc VS pairwise comparisons

I am doing some research that I am analysing with a 2 way ANOVA, using SPSS version 17 software. The design of my analysis is: 2 between subject...

• Replies: 6
• Views: 21,176
04-19-2011, 09:05 PM
46. ### 2 Way ANOVA questions

1. Why does the main factor MSS in 2 way ANOVA sometimes carry long interaction effect? 2. Why does (Yi - Yj - Yij +Ygrand) appear in the...

• Replies: 0
• Views: 3,368
12-14-2008, 03:41 PM
47. ### 2 way anova vs.2 factor anova vs. block anova

My head is swimming with terms. We learned a one way anova and then a block anova. The example was rows of different sporting good items and columns...

• Replies: 3
• Views: 13,122
11-19-2010, 10:48 AM
48. ### 2 way anova with interaction

Hi Everyone, I have a huge dilemma about reporting my ANOVA, Both the factors and the interactions have significant p values. I went ahead and...

• Replies: 1
• Views: 1,216
10-20-2013, 11:17 AM
49. ### 2 way ANOVA with no interaction

Hi, I have a data set with the following factors: Strain (1 depressive rat model, 2 control rat groups) and Region (8 brain regions) and receptor...

• Replies: 3
• Views: 1,233
06-02-2014, 06:31 AM
50. ### 2 way ANOVA, multiple response variables.

Hello everyone, I would like to perform a 2-factor anova test, but I have some doubts. I'm working with mice in which we assess multiple...

• Replies: 2
• Views: 3,962
11-20-2012, 05:59 PM
51. ### 2 way ANOVA? or repeated measures ANOVA?

Hi, sorry if this is really obvious, but I have this dataset i'm meant to analyse using prism, but I'm not sure i've done the right test? I'm...

• Replies: 3
• Views: 1,975
01-08-2013, 07:02 PM
52. ### 2 way cross classification ANOVA

hey there, I need to suggest why when partitioning the total sum of squares in a 2 way cross classification ANOVA into the individual...

• Replies: 1
• Views: 3,822
03-07-2006, 08:16 PM
53. ### 2 way mixed anova

im writing up a practical report on eating behaviours..ive analysed the results using a 2 way mixed anova,, dont know how to interpret it though.....

• Replies: 1
• Views: 3,831
12-28-2007, 11:35 AM

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