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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: 197,211
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: 66,986
09-30-2005, 09:44 AM
1. ### Help summing 2 normal R.v's in Excel

I have an excel based question involving the summation of normal random variables. If we have 2 normally distributed random variables x≈N(0,1),...

• Replies: 0
• Views: 2,152
03-02-2009, 10:14 AM
2. ### Help The basic practive of statisitc 4th edition

Hello, I am looking for answers for the sample problems so that I can have a better understanding of Confidence Intervals and Signigicance...

• Replies: 0
• Views: 6,769
09-11-2007, 12:48 PM
3. ### Help to choose appropriate statistics for research

I am working on my first research project. I am really junior in this matter. My research aims to explore factors associated with change of financial...

• Replies: 12
• Views: 4,231
08-03-2007, 05:45 AM
4. ### Help understand probability in a simply random sample

Quoted is an extract for Sample Survey Principles and Methods, Vic Barnett(2002) Pg 34 The concept of probability averaging only arises in...

• Replies: 0
• Views: 963
04-07-2014, 06:56 AM
5. ### Help understanding Alternative Hypothesis

How do you know if the alternative hypothesis will have a greater than or less than sign? what specific terms should I look for in order to...

• Replies: 0
• Views: 5,312
11-11-2009, 08:07 PM
6. ### Help understanding fixed effects...

Need to understand fixed effects better. Say you were looking at how two policies (soda tax and candy tax) affect some outcome (obesity). You have...

• Replies: 2
• Views: 3,066
08-20-2012, 08:33 PM
7. ### Help understanding K means results

Hi there, I am doing K means statistics in SPSS for the first time and I am unsure of what exatly the results show. I have outputs of 'Initial...

• Replies: 1
• Views: 1,678
03-07-2014, 01:28 AM
8. ### Help understanding log transformation and it's use in confidence intervals

I have raw data and have done a 90% confidence interval on it (I'm using R and am a beginner , but think I've done it right) I also transformed...

• Replies: 0
• Views: 2,290
12-24-2012, 07:32 PM
9. ### Help understanding Q Q plot....

I'm trying to understand elements of a Q Q plot and am struggling with the following.... So I understand if the quantiles of my sample match up...

• Replies: 1
• Views: 4,754
12-19-2012, 12:53 AM
10. ### help understanding t-distribution

Hi, I need help understanding how do I use t-distribution to estimate the tα/2 . Also what is meant when it asks "verify your result with empirical...

• Replies: 5
• Views: 4,760
BGM
06-21-2010, 11:56 PM
11. ### help understanding the empirical rule

I know this is basic,but I don't understand how using the mean and the standard deviation provides a percentage..:eek:

• Replies: 0
• Views: 4,624
01-18-2008, 04:18 PM
12. ### Help understanding tukey test difference of means.

Hi all, I am using a Tukey test, posthoc analysis to look at the differences of means between 2 sample groups. My question is that I have one...

• Replies: 0
• Views: 1,789
12-12-2016, 03:28 PM
13. ### Help using MANOVA for a confused biologist

Hi all, I have run an experiment where I measured 2 leaf surface characterists, under 2 environmental conditions: normal and stress. These...

• Replies: 1
• Views: 3,906
04-05-2008, 05:41 AM
14. ### Help using t-test

Hi, I'm doing a uni project at the moment where I'm testing an engine on two different fuels and measuring the torque output. I've tried...

• Replies: 6
• Views: 2,797
09-16-2008, 01:29 PM
15. ### help w/ anova test selection & factors (groups)

Hello there. Stats noob here I'm an IT major so apparently stays is required for me. I have an assignment here and one of the questions is really...

• Replies: 0
• Views: 1,222
12-10-2014, 03:13 AM
16. ### Help w/ Choosing Correct Statistical Test

Hi everyone, I was wondering if anybody could help me figure out the right statistical test for my study... I have 2 independent populations of...

• Replies: 6
• Views: 2,293
04-03-2014, 06:59 PM
17. ### Help w/ gadgets, pls

I am in a basic online stats course. So far, I am doing ok with figuring out how to do the hw. My problem is that I have been out of school for...

• Replies: 4
• Views: 2,917
01-21-2006, 08:26 PM
18. ### help which test?

ok if I have 2 proportions from 2 different times but these are not fully paired data, would I do a case-wise deletion of unpaired data and use...

• Replies: 0
• Views: 2,061
11-08-2010, 03:56 AM
19. ### help with "statistical inferance about means and proportions with two populations"

Howdy, Last week i was rather ill and missed a couple days of class. I've been behind ever since and dispite my efforts to catch up can't make sense...

• Replies: 1
• Views: 2,802
05-12-2010, 11:47 AM
20. ### Help with 2-sample T Interval

Hi. I have been trying this problem for awhile and I am getting so frustrated. I have been able to complete every problem but this one. "The final...

• Replies: 1
• Views: 3,754
04-04-2008, 04:47 AM
21. ### Help with 99% ci when pop stdev is known

I'm not completely certain about this question I am shown that n = 32, sample mean = 4.93%, and population stdev = 0.42% Should i be using a normal...

• Replies: 0
• Views: 1,430
08-18-2012, 04:05 PM
22. ### Help with a basic question about the role of weights in SPSS

I'm helping someone out with kind of a cruddy dataset, I was hoping I could ask a question about how weights work in SPSS and if I'm thinking...

• Replies: 3
• Views: 1,618
03-19-2013, 11:51 AM
23. ### Help with a classification problem.

Suppose X is a RV with a normal distribution and has variance = 4. If X is from p1 then u1 = 0 and if its from p2, u2 = 14. There are equal prior...

• Replies: 0
• Views: 1,534
c2q
03-31-2012, 02:22 PM
24. ### Help with a Kernel smoothing function

Hi there, Would anybody here have a background in time series analysis? I'm trying use a Kernel smoothing method to smooth out data that I...

• Replies: 0
• Views: 1,295
03-12-2012, 05:19 AM
25. ### [SOLVED] help with a model

Hi I have a problem that I am not too familiar with in practical terms but have a braod understanding what I need to do, just not sure it is valid...

• Replies: 3
• Views: 2,099
09-22-2015, 01:41 AM
26. ### Help with a normal distribution problem

I'm studying for a test later today and I've run across a problem that I have no idea how to do. The info I have is Mu = \$6,000 sigma = \$1200. ...

• Replies: 3
• Views: 3,346
04-17-2007, 07:36 AM
27. ### Help with a pilot cohort study sample size estimation

Hi everyone, I am a new research student and I am struggling now. Please can anyone advise me on sample size required for my project? I am...

• Replies: 4
• Views: 8,198
09-02-2010, 06:18 PM
28. ### Help with a power analysis.

I am trying to do a post-hoc power analysis on my data, but I cannot figure out exactly how to do it. The experimental design was a repeated...

• Replies: 1
• Views: 2,835
04-11-2008, 12:24 PM
29. ### Help with a problem for hypothesis.

Hi everyone, I am new here. My name is Debbie, and need help working out a problem in which I have to come up with an hypothesis and show all steps...

• Replies: 1
• Views: 2,851
10-14-2008, 01:54 PM
30. ### Help with a problem on confidence interval for means

My homework problem is as follows: “The weight of salmon in two different rivers are normally distributed with mean μ1, μ2, respectively, and...

• Replies: 17
• Views: 4,238
06-01-2011, 09:48 PM
31. ### Help with a project, not sure where to start >o<

Hi, I took a survey in which the data collected was non-numerical. For example, for most questions the options were either yes/no or...

• Replies: 2
• Views: 1,999
12-03-2006, 05:10 PM
32. ### Help with a question

Hey can someone please help me with my hw, it counts as a quiz grade, here a a few im stuck on the question is: the following are resitant: a....

• Replies: 1
• Views: 2,360
09-20-2007, 04:21 PM
33. ### help with a question--

can you use a covariate that is negative such as -.50?

• Replies: 1
• Views: 1,789
08-01-2007, 03:24 PM
34. ### Help with a real world problem

Hello, I was wondering if anybody could help me with the following problem (this is an actual real life situation, not a textbook problem) A...

• Replies: 0
• Views: 2,239
10-30-2007, 08:16 PM
35. ### Help with a regression model for thesis

Hi all, First, thanks in advance for any help. I'm trying to add some control variables into an OLS model, but because of the type of data I'm...

• Replies: 0
• Views: 1,528
03-20-2009, 09:49 PM
36. ### Help with a relatively simple question

I have been given a question relating to the number of red, blue, green, orange, green, and brown M&M's in 17 bags of candy. We are given a table...

• Replies: 1
• Views: 3,536
10-25-2010, 01:09 PM
37. ### Help with a sample representing a population.

I have a quick question on samples representing a population and I've been away from statistics for quite a while. I will explain my situation below....

• Replies: 0
• Views: 2,279
08-01-2012, 01:18 PM
38. ### help with a seemingly very simple test. any assistance would be greatly appreciated

Hello, I don't know why (my dyslexia may be kicking in though), however, I am having a very difficult time trying to figure out what test to use....

• Replies: 0
• Views: 743
10-21-2015, 12:13 PM
39. ### Help with a very basic question

Hi there, I have to undertake a piece of work whereby I need to be able to demonstrate which of a number of different factors have the most...

• Replies: 2
• Views: 2,118
11-10-2011, 09:36 AM
40. ### Help with almonds!!!

hey guys i am new here and am having trouble with this problem... Consider the market for almonds. Assume that quantity supplied is a linear...

• Replies: 0
• Views: 1,755
03-26-2006, 09:11 PM
41. ### Help with alpha level

Hi, I realise this sounds a bit daft, but I'm in a position where I need to use t-tests/Wilcoxon tests instead of a 2x2 mixed-design ANOVA (time...

• Replies: 0
• Views: 2,203
07-24-2010, 12:38 AM
42. ### Help with alternative hypothesis

Hi I would be obliged if someone could tell me if I am right and point me in the right direction if I am not. This has to do with a general linear...

• Replies: 2
• Views: 2,411
10-31-2007, 07:01 PM
43. ### Help with an assignment

Hello, I'm busy doing an assignment and cannot decide what to do with one of the questions. I have a data set of 120 men and women with different...

• Replies: 0
• Views: 2,301
trd
03-01-2008, 03:04 PM
44. ### Help with an easy stats problem!

1. The faculty grievance system at a university specifies that a 5-member hearing panel shall be drawn at random from the 30-member grievance...

• Replies: 0
• Views: 2,602
12-07-2009, 09:19 PM
45. ### Help with analysing a survey

I have survey consisting of 11 items (n=270), which are multidimensional. The items differ on a 5-point Likert scale. Apart from the rationale behind...

• Replies: 3
• Views: 2,248
01-26-2011, 01:39 AM
46. ### Help with analysis of statistical data

Hi, I'm new to this forum, the reason I chose to sing up was because I'm currently in the middle of solving a statistical assignment for my...

• Replies: 0
• Views: 2,372
05-03-2010, 01:24 PM
47. ### Help with ANOVA

Hello thank you very much for your educational videos. I have a question about one-way anova and I would be very grateful if you can give some...

• Replies: 3
• Views: 2,978
10-16-2008, 12:58 PM
48. ### Help with ANOVA

Hello! I'd really appreciate some piece of advice. I've just finished gathering some experimental data and i would like to draw some valid...

• Replies: 0
• Views: 1,441
01-21-2012, 06:10 PM
49. ### Help with ANOVA Analysis of Data

I need to compute: The sum of squares associated with sex from the ANOVA table; Create histograms of the data used in the ANOVA for each level of...

• Replies: 0
• Views: 1,454
04-20-2014, 08:50 AM
50. ### help with anova/manova/ancova???

Hello, I'm a first time poster, please excuse my long-winded question! I am trying to analyze the results of my experiment which is set up as...

• Replies: 0
• Views: 1,557
09-19-2012, 07:13 PM
51. ### Help with ANOVAS

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• Replies: 1
• Views: 1,441
04-15-2013, 07:21 AM
52. ### Help with assessing correlation

I have a few paired sets of data I wish to assess for correlation. But the data are from a survey, which was made up of questions where some to which...

• Replies: 0
• Views: 1,042
04-04-2012, 10:22 AM

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