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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: 196,581
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: 66,632
09-30-2005, 09:44 AM
1. ### Are standardised effect sizes usually biased?

Hi all. I've been thinking about standardized effect sizes such as Cohen's D. They're getting pretty popular in psychology, and quant research...

• Replies: 10
• Views: 1,852
06-12-2014, 08:46 PM
2. ### whether Y(employees injured) variation is due to X1(job function) or X2(population)

Here is the actual question- There are 1000 employees in a firm, and the firm has four departments namely D1, D2, D3 and D4 with 100, 200, 300, 400...

• Replies: 10
• Views: 2,049
08-25-2014, 09:39 PM
3. ### Using range instead of standard deviation?

In what circumstances would it be better to use the range than the standard deviation?

• Replies: 10
• Views: 3,432
09-11-2014, 03:21 PM
4. ### very large exp(B) value - seems strange

Hi, I ran a logistic regression in SPSS with two dichotomous categorical predictors and their interaction to predict my dichotomous outcome...

• Replies: 10
• Views: 4,565
10-23-2014, 01:26 PM
5. ### sampling distributions

i really need help in sampling distributions can you help ?

• Replies: 9
• Views: 3,769
11-27-2005, 11:38 PM
6. ### skewness issue

I'm trying to find the skewness for this distribution using SPSS: Bin..........Freq 0-10........78 10-20......2589 20-30......922...

• Replies: 9
• Views: 3,559
02-16-2006, 04:30 PM

Hi. Cool forum btw - just what I need! :) I have agonised over this for while. I have two lots of questionnaire data - for one study this is...

• Replies: 9
• Views: 3,403
06-19-2006, 10:07 PM
8. ### Complete Novice needs help with Analysis

Hi all, Hope you are well. I'm in a situation with regards to a survey I have completed for my final year at University. The survey aims to...

• Replies: 9
• Views: 4,006
11-23-2006, 11:19 AM
9. ### Need help to understand these

Hello all, I need some help in understanding these, that's how to solve them. 1. I am selling pumpkins, and I sell an average of 100 per day....

• Replies: 9
• Views: 3,739
05-13-2008, 03:02 PM
10. ### Case vs Group of Controls

Hi. I am a medical resident doing a required research project. Perhaps someone can help me by pointing me towards the correct statistical test. I...

• Replies: 9
• Views: 4,173
05-28-2008, 08:43 PM
11. ### Stats help on pearson's and spearman's

Can someone please tell from the information given below, which equation (Pearson's r or Spearman's) would be most accurate and why? Pearson' s r=...

• Replies: 9
• Views: 4,980
06-06-2008, 11:15 PM
12. ### Small sample. What to do?

Guys, My sample size is small...really small. Thinking of running non parametric test. Just wondering whether I can proceed or not. Need ur...

• Replies: 9
• Views: 4,498
09-17-2008, 11:05 PM
13. ### sample size calculation based on correlation analysis

For one of my studies, I have a continuous variable ‘x’ for each subject. All the subjects will be given a questionnaire for a symptom assessment and...

• Replies: 9
• Views: 13,338
09-22-2008, 10:37 PM
14. ### I cant figure out the number of classes

from these numbers I have to make a six column f/d table 30 26 16 23 22 10 8 15 16 23 29 30 22 15 24 9 5 4 15 24 21 24 16 14 21 13 6 2 23 29 24...

• Replies: 9
• Views: 9,946
10-12-2008, 02:19 PM
15. ### Help Please,before Saturday 10/25/08-Sample Size calculation

hi guy i have couple of test review questions that i could not solve, if you can help me, i appricate it. 1.A researcher wishes to estimate the...

• Replies: 9
• Views: 4,032
10-24-2008, 02:38 AM
16. ### corrections for when you thought of it in Neyman-Pearson

Here´s are rather general question about significance testing that I am not really able to get a grip on. In the Neyman-Pearson framework of...

• Replies: 9
• Views: 3,927
10-23-2008, 04:30 AM
17. ### Ti 84 and weighted descriptive stats

Hi Im really gettin frustrated here and I know some amazing person will help. I have a class where i constantly get problems like this: ...

• Replies: 9
• Views: 4,626
11-18-2008, 08:03 AM
18. ### Is the game fair?

Hi, I have recorded the results of a binomial game (1 = win, 0 = lose.) The sequence is presented below. I am asked to provide compelling...

• Replies: 9
• Views: 4,282
12-04-2008, 05:03 PM
19. ### Defining T- Value

Hello : I have a quick question to ask from your all. The question is very fair and simple and contain no more info. Actually I am taking out the...

• Replies: 9
• Views: 3,018
12-09-2008, 03:13 PM
20. ### Tukey table/chart

Can anyone help me with this? I'd like to carry out a Tukey test for comparing the mean of 27 samples (and the degree of freedom is 26)....

• Replies: 9
• Views: 14,305
07-11-2011, 06:00 PM
21. ### Statistics, Non-parametric Methods!!!

Please suggest me what Method I should use for this question. :wave: I think its either Wilcoxon signed-rank test or Mann-Whitney-Wilcoxon...

• Replies: 9
• Views: 3,179
01-31-2009, 12:40 AM
22. ### Chisquared equivalent for 2x5 table?

Hi, I have a quick question re: analysing a dataset. The resulting table is 5 rows (a,b,c,d,e) and 2 columns (yes/no). I would like to determine...

• Replies: 9
• Views: 9,269
01-26-2009, 04:02 PM
23. ### Find P (Urgent help, please!)

Can't figure it out, and I'll lose 25 points on the rest of the question if I don't do it right. Can't find a private teacher around my area, and...

• Replies: 9
• Views: 3,348
01-31-2009, 11:37 PM
24. ### Converting scientific to regular notation

Hi there, Would anyone know how to convert 8.55E-007 to regular notation? Is there an online converter that can do this? Thanks, N:)

• Replies: 9
• Views: 5,302
04-12-2009, 08:55 PM
25. ### Which test?

Hello I'm sorry to bother everyone but this probably has such a simple solution, but I can't get my head round it! I have read every statistics...

• Replies: 9
• Views: 2,464
06-29-2009, 12:42 PM
26. ### Logistic regression: poorly distributed observations. What are the problems?

I want to apply logistic regression to investigate the relative significance of various categorical predictor variables on a particular dichotomous...

• Replies: 9
• Views: 3,283
09-02-2009, 02:18 AM
27. ### Regression Equation

Hi I am wondering if someone could please help me with a problem that I have with a project. I need to find an equation for a regression. I am...

• Replies: 9
• Views: 4,370
10-05-2009, 08:45 PM
28. ### How to scale the Gamma distribution when its probability is more than 1?

Let us assume we have a gamma distribution with parameters alpha (or theta) = 1.33, beta (or k) = 0.0124 Some values of this gamma...

• Replies: 9
• Views: 8,108
01-01-2010, 10:33 PM
29. ### Significance test when not sampling

I would like getting references to articles/books regarding this problem. My observations are all the countries of the world - in other words no...

• Replies: 9
• Views: 3,088
01-21-2010, 03:31 AM
30. ### Standard deviation and variance examples needed

I am trying to calculate SS, variance and standard deviation for the following sample of n = 5 scores: 10, 3, 8, 0, 4. Now the sum of squares...

• Replies: 9
• Views: 13,393
02-08-2010, 04:24 PM
31. ### Statistics of device life using different batteries??

Consider a device that requires a set of batteries in order to function. When any one of these batteries fails, then the device will not function. ...

• Replies: 9
• Views: 3,092
05-09-2010, 02:41 PM
32. ### Non-significant Omnibus F with significant Post-hoc

In a 2x2 ANOVA with 2 levels for each of the IV's (example: gender-M/F and handedness-Left/Right): I get a non-significant omnibus F in a model...

• Replies: 9
• Views: 14,746
06-15-2010, 04:32 PM
33. ### Time Series analysis question

Hi all, I have "panel data" (kind of) by country for "publication share," ie the percentage of total global publications contributed by a specific...

• Replies: 9
• Views: 4,663
07-13-2010, 10:46 AM
34. ### Standard use of dummy variables fails in logistic regression

I'm using a logistic regression to, among other things, adjust for the probability of a piece of evidence being true depending on its source. I have...

• Replies: 9
• Views: 5,895
07-28-2010, 03:14 PM
35. ### Effect in Experiment help needed

Hi guys, First of all thanks for creating such a thing as a Stats help forum. This is one topic people will be flummoxed by at times and taking...

• Replies: 9
• Views: 2,729
08-15-2010, 09:14 AM
36. ### Confidence interval for median

The question is: A traffic warden notes the time cars have been illegally parked after their metered time has expired. For 16 offending cars...

• Replies: 9
• Views: 28,491
10-12-2010, 09:58 AM

Who is wrong? here is the question about difference between two means and my readings and kaddstats are way different The manufacturers of Good-O...

• Replies: 9
• Views: 5,655
10-07-2010, 10:31 PM

i need help please, i have to present this results today. i just discovered that one of the variables (age)that i found it to be significantly...

• Replies: 9
• Views: 3,264
10-07-2010, 12:33 AM
39. ### Variance Question

The government must decide how much a homeowner has to pay for a flood insurance policy lasting one year. Suppose there is a 2.5% chance that a flood...

• Replies: 9
• Views: 3,125
10-13-2010, 01:03 PM
40. ### Few Simple Yet Hard Questions

I am wondering if someone can help me understand why the answer for this question is what it is. Thanks 1) Brokers on Wall Street have to decide...

• Replies: 9
• Views: 6,787
10-14-2010, 04:11 PM
41. ### standard deviation

Hi, I'm new to this, so sorry if this has already been explained. My question is this: is it possible to have a mean=2.5 and a sd of 1.4, if it is...

• Replies: 9
• Views: 3,824
10-29-2010, 03:09 PM
42. ### Factors Retaining in Principal Component Analysis

Hi everyone, I’m running PCA (Promax rotation) and encountering few problems. I would highly appreciate if anyone of you can shed some light on...

• Replies: 9
• Views: 4,385
11-05-2010, 02:18 AM
43. ### A simple question about variance/standard deviation

I have a simple question about variance and standard deviation. i know they try to represent the average deviance from the mean. But why use sum of...

• Replies: 9
• Views: 6,277
01-05-2011, 05:27 PM
44. ### Urgent: Conditional Variance

Hi, can someone please help me deriving the conditional variance. I've been working on this for about 2 weeks, my lecturer doesn't help and can't...

• Replies: 9
• Views: 5,402
01-10-2011, 11:07 AM
45. ### running a test with only n and mean (no single data points)

Hi, I was wondering if it is is possible to use inferential statistics on two samples whereby all you know is the sample size of respondents (n)...

• Replies: 9
• Views: 3,545
01-27-2011, 01:50 PM
46. ### probability distribution of the ALTERNATIVE

hello there! another quick question which i know it must be really basic but still... i'm having a little bit of trouble wrapping my head around the...

• Replies: 9
• Views: 3,079
03-30-2011, 07:25 PM
47. ### Likert scale statistical analysis

Hi, I am doing research using a questionnaire which uses likert scale ratings. There are 8 different hypotheses and the questionnaire is set up so...

• Replies: 9
• Views: 11,368
04-07-2011, 10:04 AM
48. ### How to use a Distance Matrix as an Independent Variable?

Hello, Let's say I have 100 locations. I know the distance between each location (i.e. distance matrix). How can I use the distance matrix (or...

• Replies: 9
• Views: 2,811
05-19-2011, 08:32 PM

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