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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: 197,002
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: 66,873
09-30-2005, 09:44 AM
1. ### A query about interaction and contrasts

Hello everybody, I'm quite new at statistics, despite I'm doing research since some time ago. I've a straightforwad query this time. Well: -My...

• Replies: 0
• Views: 1,731
11-09-2008, 01:00 PM
2. ### A question + some problem

Hi all, I am glad that i found this forum. Statistics have never been my strong point. Anyway, I have a qustion and a rather strange problem. My...

• Replies: 3
• Views: 1,821
11-09-2007, 07:22 PM
3. ### A question about ANCOVA

Hello, I am working on a pre-test post-test quasi-experimental design, for testing the effectiveness of 2 teaching methods. There are 2...

• Replies: 2
• Views: 1,083
01-21-2012, 05:54 AM
4. ### A question about data scales

Hey everyone, So for a project I am supposed to decide on the most appropriate statistical analysis to investigate the relationship between the...

• Replies: 0
• Views: 899
06-02-2016, 11:56 AM
5. ### A question about determining significance

Hi guys I'm trying to compare the differences in the results of a fitness test done by two different methods (and performed on a sample group of...

• Replies: 16
• Views: 7,626
05-12-2010, 03:10 AM
6. ### A question about effect sizes (cohen's d)

Hi there, i'd very much appreciate anyone's help. I need to calculate effect sizes (cohen's d) for pre and post scores for a treatment i've been...

• Replies: 1
• Views: 5,906
08-22-2008, 12:47 PM
7. ### A question about p-value interpertation

Hello. I would really appreciate help with a question I am facing. I hope I am posting it in the right place. I am preparing for a board exam in...

• Replies: 4
• Views: 2,461
Nir
02-10-2016, 06:21 PM
8. ### A question about paired sample t test

I have a question about paired sample t test, your advices are much appreciated. Thanks. I know paired-sample t test is for the same group of...

• Replies: 1
• Views: 2,664
07-07-2013, 04:41 PM
9. ### A Question about Regression analysis

Hello! If only pretest scores are used as a covariate in a pre-posttest experimental study (& a number of other relevant independent variables can...

• Replies: 5
• Views: 1,760
02-11-2013, 10:08 AM
10. ### A question about Spearman's Rank and Mean Values

Hello, I'm not entirely sure I've put this in the correct forum... This is possibly a daft question, but I have used SPSS to calculated...

• Replies: 2
• Views: 839
04-28-2015, 04:54 AM
11. ### a question about statistic approach to use

I moved this thread to another place and please delete this thread. Thank you.

• Replies: 0
• Views: 1,374
08-03-2015, 11:22 AM
12. ### A question about using Generalized estimating equations (GEEs)

Dear All, I have a question regarding using GEEs to test some of my mating system data (the temporal and spatial proximity of males in regard to a...

• Replies: 0
• Views: 42
10-09-2017, 06:23 AM
13. ### A question about when two way ANOVA is appropriate

If I'm comparing two factors Shipping method and Production Location and its a 3x3 test but I only have one replication for each level should the...

• Replies: 2
• Views: 2,847
02-09-2011, 03:03 PM
14. ### A question about whether dropping interaction terms as a whole or not

Hello! I'm taking a regression course this semester and I have a question regarding when to drop the interaction terms. Suppose we have a...

• Replies: 3
• Views: 1,067
11-19-2014, 04:14 PM
15. ### a question from a newbie

well, im new to stats and to this forum but got a little bit confidence after starting to read discovering stats with spss of andy field. i want...

• Replies: 4
• Views: 2,008
05-07-2014, 01:31 AM
16. ### A question in methodology

Good evening, I have a question about methodology, coz i do not know which way to go. For representing av results, I have used descriptive...

• Replies: 7
• Views: 1,258
06-09-2013, 04:03 AM
17. ### a question in uniform distribution

suppose X1,…,Xn be random sample of U(0,θ) distribution. if X(n) be largest order statistics of sample, and V=nX¯/X(n), how can I calculate...

• Replies: 1
• Views: 1,598
03-30-2014, 11:15 PM
18. ### A question on central limit theorem

Hi I have a quick question on central limit theorem. I am missing something obvious so hoping someone can help. If we had a sample set of say...

• Replies: 7
• Views: 2,925
05-03-2012, 12:39 PM
19. ### a question on errors-in-variable model

Is the parameter estimate obtained using an instrumental variable unbiased? If not, is there formula for estimated variance and sampling bias of the...

• Replies: 0
• Views: 2,183
01-25-2010, 05:05 PM
20. ### A question on means, adding and taking scores and standard deviation.

need a bit of help on my statistics homework. I've taken the class twice and no matter how much I study I seem to only be able to achieve a D. So...

• Replies: 3
• Views: 21,429
02-08-2010, 01:41 PM
21. ### A question on only 1 aspect of this problem

This problem as a whole is not elementary statistics, however, I a question with only 1 aspect of this problem which is elementary. I'll go ahead and...

• Replies: 1
• Views: 2,802
11-15-2010, 08:09 PM
22. ### A Question on Percentiles

Hi All, I have a question on percentiles. I have some data that is in 5 minute intervals. Each 5 minute period has an average time in seconds that...

• Replies: 2
• Views: 2,775
08-09-2007, 04:48 AM
23. ### A question on treatment statistics

Hi - im new here, so i dont know how this works, but i hope someone will take some time to explain this to me. The model is called the 'switching...

• Replies: 0
• Views: 1,895
01-20-2010, 09:56 AM
24. ### A question regarding cross tabulation and Fisher's exact test

Hello guys I have a set of categorical data and I want to test the significance of the deviation for. Here are the details; I have a population...

• Replies: 5
• Views: 3,863
02-24-2011, 03:35 PM
25. ### A question regarding the size of a sample

Hello everyone! these days I am working with seemingly unrelated regression to improve the efficiency of my results. Now, I am wondering how...

• Replies: 0
• Views: 1,789
11-20-2008, 09:20 AM
26. ### a quick stats questions about p and F/t values

Hi, I am pretty new to stats and am doing a heap of F-tests and t-tests. i was under the impression that when the calculated value (F or t) was...

• Replies: 1
• Views: 2,816
09-08-2010, 09:52 AM
27. ### A random sample

Hi, Can someone help me? n=18 o=10 Alfa=5% Is that good? ;)

• Replies: 1
• Views: 2,767
12-01-2010, 02:14 PM
28. ### A reference for those who have censored data (below detectable limits)

Hi everyone. There have been a couple of enquiries lately about censored data (data that are below detectable limits). I deal with this alot...

• Replies: 0
• Views: 1,734
05-16-2011, 06:54 PM
29. ### A regular EOQ model is appropriate when demand is seasonal.

A regular EOQ model is appropriate when demand is seasonal. a. True b. False

• Replies: 4
• Views: 4,276
12-07-2011, 11:01 AM
30. ### A sampling power question

Hi I have a question regarding a power calculation. It is best explained by the example below: If I have a lot of of red and black balls in a...

• Replies: 5
• Views: 2,811
02-09-2011, 04:48 PM
31. ### a sampling strategy to compare population densities between unequally sized habitats

Hello, If I want to compare the population density of a single species found in each of three habitats, I am unsure whether to use a stratified...

• Replies: 0
• Views: 2,174
04-25-2011, 01:43 PM
32. ### A simple one but having a hard time to explain

Well as you may or not know i'm writing my thesis... The deal is i created a linear regression model. I found in the model that, lets give it...

• Replies: 0
• Views: 2,173
11-01-2008, 03:09 PM
33. ### a simple problem

in elections , the mean of candidates per an electoral district was 60 candidates with a standard deviation 10 candidates.. 80% were males . for...

• Replies: 0
• Views: 2,445
06-06-2008, 07:38 PM
34. ### A simple problem, maybe?

Hi, My grasp of statistics is limited to one undergraduate course, so please bear with me. I have the following problem: I have a population...

• Replies: 2
• Views: 2,497
10-21-2009, 12:11 PM
35. ### A simple question about correlation___new comer

Hi everybody, I'm new here =) I like statistics!!! Now comes my question: Known item-total correlation of each item in a scale, can the...

• Replies: 3
• Views: 1,231
08-02-2013, 01:56 PM
36. ### a simple question about expectation with 2 random variables.

Dear all... Please help me with this simple example. Example)X and Y are 2 random variables with the density function of below. f X,Y (x,y)={ 2 ...

• Replies: 1
• Views: 1,715
06-29-2011, 06:51 AM
37. ### 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: 6,349
01-05-2011, 05:27 PM
38. ### A simple question by an amatuer

Hi, I'm having a lot of trouble with a particular question I have been given: The following data sets represent the gross yield (%) on 14 oil...

• Replies: 1
• Views: 2,147
11-01-2007, 02:03 PM
39. ### A simple question regarding coefficient of variation in angular measurements.

Hi all It is not a major question, just for personal curiosity. Our statistics proff states that it is the coefficient of variation (CV = SD...

• Replies: 0
• Views: 2,238
07-03-2012, 05:15 AM
40. ### A simple question!

I have a very simple but basic question. I work using real time polymerase chain reaction (RTPCR) for estimation of the number of mRNAs coding for...

• Replies: 0
• Views: 1,843
09-16-2011, 01:54 PM
41. ### A simple question: Looking to compare counts conducted by 2 counters of the same data

Hello, I am looking for an appropriate statistical method to test my hypothesis that there is no significant difference between counts conducted...

• Replies: 3
• Views: 1,384
02-06-2014, 06:46 PM
42. ### A Simple Survey -- Critique Me!

Hi everyone! First time poster here! :wave: I'm designing a survey for my small business -- but unfortunately, I know very little about...

• Replies: 0
• Views: 1,849
08-13-2006, 04:02 PM
43. ### A single value that summarises trust in sample mean

Suppose I have a number N of independent ratings of a given item, where each rating is an integer between 1 and 7 (inclusive). For simplicity sake,...

• Replies: 4
• Views: 2,567
07-09-2011, 11:14 AM
44. ### A small DNA with statistics puzzle

I'm a geneticist, having a problem with the following question. If anyone could help me out? - A sequence consists of nucleotides - A nucleotide...

• Replies: 0
• Views: 2,626
10-22-2007, 09:50 AM
45. ### A Soldier in Combat need help with Discussion (Monty Hall)

Can anyone please tell me in Statistics with the following A number of years ago, there was a popular television game show called "Let's Make a...

• Replies: 19
• Views: 11,137
03-21-2011, 03:26 PM
46. ### A statistic question.

Provider Charge(Total) Fraud %Fraud Fraud*%Fraud A §§§§§§§1000§§§§§§§600§§§§§0.6§§§§§§360 B §§§§§§§100§§§§§§§§70§§§§§§0.7§§§§§§49 C...

• Replies: 0
• Views: 1,007
07-19-2016, 08:55 PM
47. ### A Statistical Test Learning Rate?

First off, I apologize if I am creating a new thread for something that already exists. I used the search option, but didn't find anything that...

• Replies: 0
• Views: 1,099
08-21-2015, 08:17 AM
48. ### a statistics book that include these topics?

Hello, I am after a statistics book that include the following topics: logit and probit modelling, advanced discrete choice or outcome techniques...

• Replies: 1
• Views: 2,206
08-15-2011, 06:43 AM
49. ### A statistics problem and no clue how to solve it

Hi All, This is my first post on this forum, I hope I've come to the right place. I'm a complete idiot when it comes to statistics, but I have a...

• Replies: 5
• Views: 3,118
03-01-2009, 08:21 PM
50. ### a student after data transformation

Hi all, I am working with a set of microarray data consisted of 211 samples and 20000 genes each. I try to calculate the differences of gene...

• Replies: 1
• Views: 1,761
02-28-2010, 08:13 PM
51. ### A student organization

Is this answer correct? A student organization plans to ask 100 randomly selected students how much they spent on textbooks last semester. You...

• Replies: 1
• Views: 3,736
01-16-2006, 10:00 AM
52. ### A study was carried out to investigate whether the type of milk used is the same ....

A study was carried out to investigate whether the type of milk used is the same among young people as among older ones. A sample of 500 people...

• Replies: 4
• Views: 1,678
03-07-2016, 02:35 PM
53. ### a suitable rough rescaling

hello there, I want to use k-nearest neighbours but first I need to scale the data so that the range of the 7 explanatory is roughly 1.I have...

• Replies: 0
• Views: 1,680
04-07-2009, 04:56 AM
54. ### a suitable roughly rescale

Hi there the folowing code is for training dataset (trPima) and testing dataset (tePima) I want to use k-nearest neighbours but first I need to...

• Replies: 0
• Views: 1,788
04-16-2009, 04:00 AM
55. ### A survey where participants circled at least one answer as the question asked

I have surveys I am working on. One of the questions asks the participants to circle religious themes that appeals to them and also that they should...

• Replies: 0
• Views: 1,391
03-29-2015, 01:00 AM
56. ### A T test, MRPP, or something else? Using R or Systat

MRPP (Multiple Response Permutation Procedures) has a stand alone software: Blossom. It works well. Cheers,

• Replies: 0
• Views: 2,125
07-25-2008, 08:32 PM
57. ### A test for a 'buffer' hypothesis

Just wondered if anyone knows how I can test the hypothesis: 'Higher levels of Job Control act as a buffer against fatigue related to Job Demands' ...

• Replies: 0
• Views: 1,512
05-03-2007, 10:26 PM

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