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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: 66,802
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: 196,841
07-16-2014, 11:01 AM
1. ### Help on hw problem

Answer TRUE or FALSE: (a) The expected value of a binomial distribution is always less than 1. (b) The Weibull distribution is a continuous...

• Replies: 2
• Views: 2,509
10-20-2008, 10:11 PM

Hello, I have 6 independent groups and one dependent variable. I did a univariate ANOVA analysis and the overall group significance was not...

• Replies: 2
• Views: 1,091
01-04-2012, 01:17 PM
3. ### Interpreting the Spearman's correlation test coefficient and p-value

I am currently trying to figure out how to use SPSS and understand the results that are generated by the different tests I'm performing on my data. ...

• Replies: 0
• Views: 888
06-23-2016, 09:23 AM
4. ### single dependent variable and multiple independent variables

I have one dependent variable (DV) and eight independent variables (IV). I need to see the effect of each IV on the DV as well as the combined effect...

• Replies: 2
• Views: 1,171
12-25-2013, 02:49 PM
5. ### What is better: higher number of participants or identical participants?

Dear all, I am a language teacher and currently conducting a research project into vocabulary acquisition. For this project, I had a setup of 1...

• Replies: 5
• Views: 4,278
06-19-2007, 08:49 AM
6. ### MGF question

Not to familiar with Moment Generating Functions will some one walk me though this example.... MGF of X1+X2+X3+X4 and MGF or X3+X4

• Replies: 1
• Views: 1,192
11-08-2012, 02:41 PM
7. ### Uncertainty for p = 0 for binomial distribution?

I have some data (4 runs each of about 10 trials) which is binomial with n_hits/N_trials n/N = 0/11, 0/9, 0/10, 0/10 So, I estimate the...

• Replies: 0
• Views: 1,721
04-28-2011, 01:09 PM
8. ### statistics question re margin of error, standard deviation

I took a test for which the score range was 70-130. A score of 100 represents the average score of my peer group. The standard deviation was 15. My...

• Replies: 0
• Views: 1,568
06-08-2014, 05:17 PM
9. ### Psych Stats - Help with Review Q'z

I just received a stats review sheet with tons of questions which I am suppose to do as exam review for my psych stats course and I have a few...

• Replies: 3
• Views: 3,866
05-09-2006, 08:08 PM
10. ### binomial/hypothesis tests

hello for the following question i was able to answer part A and B but i dont know how to answer part C ...

• Replies: 1
• Views: 2,430
05-19-2006, 01:45 PM
11. ### textbook question

im having trouble with this question - i dont know how the textbook arrived at the answer of losing 1.3 cents per game on average A gambler...

• Replies: 3
• Views: 3,194
05-23-2006, 08:18 AM
12. ### hmwk problem - need help

One day, it suddenly occurs to you that students at Western seem to be taller than the national average, which you know to be 66 inches. To test your...

• Replies: 1
• Views: 1,630
05-31-2006, 12:10 PM
13. ### Do I perform a Z-test?

Hi all: Student population 1: M = 62.77, SD = 6.52 Student population 2: M = 72.91, SD = 6.22 Student population 3: M = 74.61, SD = 6.60 ...

• Replies: 2
• Views: 3,298
02-04-2008, 02:24 PM
14. ### Measure Of Central Tendency & Graphical Representation.

I Am Unable TO Understand The Two New Chapters In Our Syllabus .i.e. To Measure The Central Tendency And Graphical Representation. M Getting...

• Replies: 1
• Views: 2,933
04-24-2011, 02:06 AM
15. ### Need your kind help regarding ANOVA (Your comment will be highly appreciated)

This is a true/false question of my business statistics course. Please let me know if it is true or false and also kindly provide a brief...

• Replies: 1
• Views: 518
06-02-2017, 03:14 AM
16. ### Binomial Distribution & qa optimization

Hi I have a question I was hoping someone could help with relating to Binomial distribution and expected value. -- In a computer chip...

• Replies: 1
• Views: 3,130
11-08-2006, 05:17 PM
17. ### Survey Size

I have taken statistics before in college and grad school (MBA), but I am so foggy. I have a simple 10 question survey I am administering in Survey...

• Replies: 7
• Views: 6,021
06-16-2009, 09:27 PM
18. ### McNemar's Test and sample size: how to estimate discordant pairs?

This post was in the biostats forum, but a quick review of the previous McNemar's topics shows most were posted in here. I want to use McNemar's...

• Replies: 0
• Views: 1,302
04-26-2016, 02:57 PM
19. ### Reporting effect size

I need to do several ANOVAs followed by Mann-Whitney U's as secondary tests due to non-normality. Does anyone know which test I should report the...

• Replies: 0
• Views: 2,701
03-28-2008, 04:04 AM
20. ### How best to proceed with mixed ANOVA follow ups

I have a bit of a problem. My data is non-normal and violates the assumption of spherity, but I have one between subjects factor (only 2 levels) and...

• Replies: 0
• Views: 2,649
03-28-2008, 10:09 AM
21. ### Fill Missing data according to a distribution

Hello We are doing this project where in we are measuring the different body dimensions of a number of people. We have data for about 500. In these...

• Replies: 0
• Views: 2,599
01-27-2010, 04:03 AM
22. ### Statistics and data analysis in excel?

Imagine you have two sets of data. Both sets have 20 values and they list the time it takes for a program to complete an operation. The first set is...

• Replies: 1
• Views: 1,858
03-29-2012, 04:59 AM
23. ### Crises: ANOVA? How to analyse non-normal, non-Homogeneity data with different N group

Dear all, I'm somewhat new the world of statistics, or at least it has been years since I last used it and basically the only program I know...

• Replies: 0
• Views: 1,268
06-05-2013, 03:57 AM
24. ### Test median again hypothesized median value_ one sample Wilcoxon signed ranks test

I have a question regarding testing a median against a hypothesized value. On a five-point Likert-style scale (1=regressed; 5 = met goal ),...

• Replies: 6
• Views: 4,852
11-07-2012, 05:32 AM
25. ### Bayes on three diece

Dear all, Today when I was playing ledo with three dice. I need only two from any single dice. I am new to probability, so I tired to solve by...

• Replies: 3
• Views: 1,407
08-05-2015, 08:50 AM
26. ### dunnett test critical value

i need help in finding the critical value for df=136, a-1=3 the dunnett table only goes up to 120, then next is infinity. how do i interpolate?

• Replies: 1
• Views: 4,035
01-17-2009, 06:31 AM
27. ### What test to use for longitudinal data and to test interactions among factors?

My study involves five plant varieties subjected to three cultivation methods in two different sites. Every week for six weeks, we record the...

• Replies: 2
• Views: 1,507
10-15-2014, 11:09 PM
28. ### Upper Bound Error for Expectation Approximation?

Dear all, I have a problem for the past few weeks and couldn't find the answer in the books or in the internet. I know that in general: E(g(X1,...

• Replies: 9
• Views: 1,464
11-24-2013, 08:38 PM
29. ### Fisher's exact

Hi, just found this forum :wave: Have a quick (and probably silly) question about Fisher's exact test - is this purely for a 2x2 table, or can it...

• Replies: 0
• Views: 3,264
05-25-2010, 09:09 AM
30. ### non linear regression

hi, I want to estimate quasi hyperbolic discounting model: x= b* (1/(1+r)^t) *y where b and r are my parameters and i want to estimate them...

• Replies: 1
• Views: 801
04-08-2014, 08:39 AM
31. ### Linear Regression Question

Hello Everyone. So I'm doing a stats assignment, and I'm having difficulty answering one of the questions. Here's the background question. A study...

• Replies: 8
• Views: 1,481
01-07-2016, 06:19 PM
32. ### Kernel Matrix Not Positive Definite

Hi everyone, there is a problem that has been bothering me for a few days now. I'll try to explain it as best as I can, but since I'm new to...

• Replies: 0
• Views: 1,186
05-24-2012, 11:30 AM
33. ### 5-point likert scale

i am currently carrying out a study for my dissertation for my physiotherapy degree I devised a questionnaire using the 5-point likert scale...

• Replies: 2
• Views: 6,825
03-18-2008, 03:34 AM
34. ### Added-Variable Plot for Panel Data

Dear all, in Frees (2004): "Longitudinal and Panel Data" there is a short description of a procedure for Added-Variable or partial regression...

• Replies: 0
• Views: 1,406
02-12-2013, 07:46 AM
35. ### [Sampling] Which type of sampling to use in this case

I would appreciate any help in this case took from a book (without answers and tips): Consider that a court wishes to evaluate the proportion of...

• Replies: 4
• Views: 1,172
04-11-2017, 11:42 AM
36. ### GLM Repeated Measures: What is the difference Covariates and Between subject factors

Hi I have two categorical variables: gender and gaming experience. When i run ANOVA in SPSS, i enter them as covariates (meaning its an ANCOVA...

• Replies: 1
• Views: 17,064
07-04-2007, 03:10 PM
37. ### Autocorrelation

Does anyone the effect of serial correlation caused by seasonal effect to standard error of if I have a seasonal effect in both your dependent and...

• Replies: 2
• Views: 1,586
09-09-2012, 05:55 AM
38. ### Kolmogorov-Smirnov Z - how to calculate effect size??

Hi there, A similar question to Laura's- how do I calculate effect sizes for the Kolmogorov-Smirnov Z? Is the Z value given by SPSS what I need,...

• Replies: 0
• Views: 8,778
12-19-2006, 07:32 AM
39. ### sample size for SEM and statistical tests

Hi, I'm about to launch a quantitative study with an organization. I thought of testing my hypotheses using SEM and some statistical tests. I...

• Replies: 3
• Views: 7,173
11-21-2010, 02:29 AM
40. ### Comparing class grades across several courses – is ANOVA appropriate?

Hi all, A group of ~20 students have taken a number of courses, some compulsory and others electives. I want to see whether there is a difference...

• Replies: 3
• Views: 31,440
04-28-2013, 07:02 PM
41. ### test statistic?

"A new flu vaccine has been administered in a small community. The vaccine was provided free of charge in a two-shot sequence. Some people received...

• Replies: 3
• Views: 3,695
05-17-2009, 08:05 AM
42. ### Chi Square Probability (Critical Value)

For an applied linguistics course I do need your help. Unfortunately , for Df= 1 the values beyond p < 0.001 are not available in chi-square...

• Replies: 3
• Views: 1,581
11-17-2015, 12:03 PM
43. ### Change score question

I am working on a pre/post intervention data set with n=19 with approximately 15 continuous subscales. When conducting paired sample ts we did not...

• Replies: 0
• Views: 2,855
02-17-2011, 11:57 PM
44. ### not significant correlation...

Hi there!!! I am wondering whether you can help me I am not familiar with statistics and I am trying to interpret the outcome of a bivariate...

• Replies: 6
• Views: 38,715
ARI
02-03-2011, 06:58 PM
45. ### bayesian estimation with amos 16

I have a model with 11 laten variables,I run bayesian estimation with amos 16. and the estimation is doesn't work. is there anyone ever has a some...

• Replies: 0
• Views: 2,593
12-05-2010, 11:16 PM
46. ### determining internal validity of conjoint model

Hi guys, I'm having a problem with determing the internal validity of my conjoint model. I have used a fractional factorial design for a full...

• Replies: 0
• Views: 4,115
03-25-2009, 02:03 PM
47. ### Detecting significance between percentages

I have a really basic question, pertaining to data analysis for my senior thesis. I've conducted a review of mammalian reintroductions over the...

• Replies: 1
• Views: 1,753
04-26-2011, 04:33 PM
48. ### Data Modelling

I need to learn predictive modelling in data analytics. Please tell me the good books and/or online resources that can be of use. I am a beginner and...

• Replies: 0
• Views: 1,705
06-07-2014, 02:06 AM
49. ### Possible to test for differences between Pearson and Spearman Correlations?

Hello. I was wondering if it is possible to test differences in correlations between a pearson correlation and a Spearman correlation from the same...

• Replies: 0
• Views: 2,705
04-17-2010, 08:18 AM
50. ### Help needed! Main effect and interaction question

I have a MINITAB printout I was hoping someone could help me with. My question is- from the table below how do i distinguish between a main effect...

• Replies: 1
• Views: 1,590
12-05-2011, 03:16 PM
51. ### Is my continuous data relevant, or am I stuck with attribute data?

I would like to validate a laser-welding process, which joins two metal components. We have a reliability/confidence requirement of 95% Reliability...

• Replies: 4
• Views: 1,186
04-11-2016, 11:41 AM
52. ### Stats help - IV with ONE level?!

Marghhhh :| This doesnt appear to exist in the stats textbooks so I'm sure I'm completely missing the point. Basically I have 3 groups of...

• Replies: 0
• Views: 2,146
12-05-2007, 09:04 AM
53. ### When to do post-hocs on ANOVA

Hi all, I have a RM anova with a between subjects factor. My significance level is 0.079 for the between subjects factor. I'm wondering whether it...

• Replies: 4
• Views: 3,751
03-29-2008, 01:19 PM
54. ### Discussing a trend in your data

Hello all, My main variable in my data analysis only reaches trend level of significance (p=0.07). I'm wondering whether it is appropriate to...

• Replies: 2
• Views: 2,634
03-25-2008, 06:32 AM
55. ### Negative R-squared?

When I enter all my predictors into my model, it comes out with an adjusted R2 thats negative - what does this mean? I thought R2 could only be...

• Replies: 2
• Views: 5,807
04-02-2008, 04:30 PM
56. ### Follow up tests in 2x4 ANOVA (mixed)

I have 2 groups and 4 conditions. There was a significant group*condition interaction. To follow up this interaction, as there are only 2 groups,...

• Replies: 0
• Views: 7,364
04-03-2008, 05:58 AM
57. ### Ceiling effects in regression

Hi all, I have quite a marked ceiling effect in my regression - what will this do in terms of assumptions? is it just normality or also...

• Replies: 2
• Views: 6,649
04-18-2008, 09:02 AM

Hi all, I was wondering whether anyone would mind proofreading my project in terms of statistics... the results section is only about 1000-1500...

• Replies: 0
• Views: 2,301
04-21-2008, 12:38 PM

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