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Forum: Statistics

Statistics course and homework discussion. Elementary statistics.

  1. Sticky Thread 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...

    Started by TheEcologist‎, 11-27-2010 12:13 PM
    • Replies: 1
    • Views: 197,211
    07-16-2014, 11:01 AM Go to last post
  2. Arrow Sticky Thread 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)...

    Started by quark‎, 09-30-2005 09:44 AM
    • Replies: 0
    • Views: 66,986
    09-30-2005, 09:44 AM Go to last post
  1. Cool 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),...

    Started by Jonah3011‎, 03-02-2009 10:14 AM
    • Replies: 0
    • Views: 2,152
    03-02-2009, 10:14 AM Go to last post
  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...

    Started by 1happyday‎, 09-11-2007 12:48 PM
    • Replies: 0
    • Views: 6,769
    09-11-2007, 12:48 PM Go to last post
  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...

    Started by mag‎, 08-02-2007 03:38 AM
    • Replies: 12
    • Views: 4,231
    08-03-2007, 05:45 AM Go to last post
  4. Help to grasp Krustal-Wallis Results

    Hi All. I have a set of observations made up of the the age of female individuals. The observation are grouped into 3 groups distinguished on...

    Started by gianmarco‎, 10-06-2009 11:16 AM
    • Replies: 2
    • Views: 2,131
    10-06-2009, 01:35 PM Go to last post
  5. 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...

    Started by sid9221‎, 04-07-2014 06:56 AM
    probability, sampling
    • Replies: 0
    • Views: 963
    04-07-2014, 06:56 AM Go to last post
  6. 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...

    Started by taiy0u‎, 11-11-2009 08:07 PM
    • Replies: 0
    • Views: 5,312
    11-11-2009, 08:07 PM Go to last post
  7. 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...

    Started by wren‎, 08-20-2012 06:20 PM
    • Replies: 2
    • Views: 3,066
    08-20-2012, 08:33 PM Go to last post
  8. Smile 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...

    Started by hithere‎, 03-05-2014 07:28 AM
    banter, data, k means. statistics, spss
    • Replies: 1
    • Views: 1,678
    03-07-2014, 01:28 AM Go to last post
  9. 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...

    Started by urbano‎, 12-24-2012 07:32 PM
    • Replies: 0
    • Views: 2,290
    12-24-2012, 07:32 PM Go to last post
  10. 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...

    Started by urbano‎, 12-18-2012 10:06 PM
    • Replies: 1
    • Views: 4,754
    12-19-2012, 12:53 AM Go to last post
  11. 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...

    Started by lilyungn‎, 06-21-2010 07:03 PM
    • Replies: 5
    • Views: 4,760
    06-21-2010, 11:56 PM Go to last post
  12. 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:

    Started by lkasse‎, 01-18-2008 04:18 PM
    • Replies: 0
    • Views: 4,624
    01-18-2008, 04:18 PM Go to last post
  13. 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...

    Started by drm258‎, 12-12-2016 03:28 PM
    anova, tukey hsd, tukey method
    • Replies: 0
    • Views: 1,789
    12-12-2016, 03:28 PM Go to last post
  14. Help understaning results for stats novice

    Hi all, Attached is an excel worksheet with some basic stats that I need help interpreting and to find out if I have done it correctly. I have...

    Started by demarc‎, 05-25-2015 10:13 PM
    • Replies: 0
    • Views: 1,153
    05-25-2015, 10:13 PM Go to last post
  15. 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...

    Started by Susannah‎, 04-04-2008 10:17 AM
    • Replies: 1
    • Views: 3,906
    04-05-2008, 05:41 AM Go to last post
  16. 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...

    Started by dhowe‎, 09-10-2008 08:35 AM
    • Replies: 6
    • Views: 2,797
    09-16-2008, 01:29 PM Go to last post
  17. 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...

    Started by theblackdog‎, 12-10-2014 03:13 AM
    2-way anova, 2-way repeated measures, anova
    • Replies: 0
    • Views: 1,222
    12-10-2014, 03:13 AM Go to last post
  18. 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...

    Started by kaycee08‎, 04-03-2014 01:39 PM
    • Replies: 6
    • Views: 2,293
    04-03-2014, 06:59 PM Go to last post
  19. 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...

    Started by SandyShockey‎, 01-21-2006 08:01 PM
    • Replies: 4
    • Views: 2,917
    01-21-2006, 08:26 PM Go to last post
  20. 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...

    Started by apdragon‎, 11-08-2010 03:56 AM
    • Replies: 0
    • Views: 2,061
    11-08-2010, 03:56 AM Go to last post
  21. 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...

    Started by Christopher Culbertson‎, 05-11-2010 09:46 PM
    • Replies: 1
    • Views: 2,802
    05-12-2010, 11:47 AM Go to last post
  22. 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...

    Started by CaitlinCaitlin077‎, 04-03-2008 02:41 PM
    • Replies: 1
    • Views: 3,754
    04-04-2008, 04:47 AM Go to last post
  23. 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...

    Started by HOTCHEETOS111‎, 08-18-2012 04:05 PM
    • Replies: 0
    • Views: 1,430
    08-18-2012, 04:05 PM Go to last post
  24. 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...

    Started by jroden‎, 03-14-2013 04:40 PM
    • Replies: 3
    • Views: 1,618
    03-19-2013, 11:51 AM Go to last post
  25. Help with a biology project

    Hello, I was wondering if someone could help me with a statistics problem. It's not really a homework question, I'm working on a biology project...

    Started by Raynor5000‎, 01-21-2008 11:58 AM
    • Replies: 2
    • Views: 2,582
    01-23-2008, 04:18 AM Go to last post
  26. Help with a Box-cox transformation

    Well... I have applied other kind of transformations to one variable which is not normal, because I want to apply krigging techninques and make a...

    Started by Ballack_27‎, 02-02-2011 04:11 PM
    • Replies: 4
    • Views: 2,370
    02-03-2011, 02:19 PM Go to last post
  27. 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...

    Started by c2q‎, 03-31-2012 02:22 PM
    • Replies: 0
    • Views: 1,534
    03-31-2012, 02:22 PM Go to last post
  28. 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...

    Started by bradyj2‎, 03-12-2012 05:19 AM
    • Replies: 0
    • Views: 1,295
    03-12-2012, 05:19 AM Go to last post
  29. [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...

    Started by bugman‎, 09-17-2015 06:22 PM
    • Replies: 3
    • Views: 2,099
    09-22-2015, 01:41 AM Go to last post
  30. 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. ...

    Started by Xanius‎, 04-16-2007 10:56 AM
    • Replies: 3
    • Views: 3,346
    04-17-2007, 07:36 AM Go to last post
  31. 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...

    Started by godsaveme‎, 09-02-2010 11:07 AM
    • Replies: 4
    • Views: 8,198
    09-02-2010, 06:18 PM Go to last post
  32. 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...

    Started by bergerdml‎, 04-05-2008 09:58 PM
    • Replies: 1
    • Views: 2,835
    04-11-2008, 12:24 PM Go to last post
  33. 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...

    Started by reddaisy‎, 10-14-2008 01:21 PM
    • Replies: 1
    • Views: 2,851
    10-14-2008, 01:54 PM Go to last post
  34. 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...

    Started by Okohme‎, 06-01-2011 02:58 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 4,238
    06-01-2011, 09:48 PM Go to last post
  35. 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...

    Started by Shiyume‎, 12-03-2006 04:16 PM
    • Replies: 2
    • Views: 1,999
    12-03-2006, 05:10 PM Go to last post
  36. 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....

    Started by nms49121‎, 09-20-2007 04:17 PM
    • Replies: 1
    • Views: 2,360
    09-20-2007, 04:21 PM Go to last post
  37. help with a question--

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

    Started by botheus‎, 07-31-2007 11:37 AM
    • Replies: 1
    • Views: 1,789
    08-01-2007, 03:24 PM Go to last post
  38. 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...

    Started by anjur‎, 10-30-2007 08:16 PM
    • Replies: 0
    • Views: 2,239
    10-30-2007, 08:16 PM Go to last post
  39. 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...

    Started by stw_25‎, 03-20-2009 09:49 PM
    • Replies: 0
    • Views: 1,528
    03-20-2009, 09:49 PM Go to last post
  40. 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...

    Started by trogtothedor‎, 10-24-2010 08:39 PM
    • Replies: 1
    • Views: 3,536
    10-25-2010, 01:09 PM Go to last post
  41. 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....

    Started by ggoodin1‎, 08-01-2012 01:18 PM
    • Replies: 0
    • Views: 2,279
    08-01-2012, 01:18 PM Go to last post
  42. 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....

    Started by redskies421‎, 10-21-2015 12:13 PM
    • Replies: 0
    • Views: 743
    10-21-2015, 12:13 PM Go to last post
  43. 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...

    Started by Cleland1981‎, 11-10-2011 06:39 AM
    • Replies: 2
    • Views: 2,118
    11-10-2011, 09:36 AM Go to last post
  44. help with ACF and PACF

    Hi Guys, Can some one help with interpreting the ACF and PACF graph, I have run a multiple regression and suspect the errors are autoregressive. I...

    Started by mayccc‎, 05-18-2016 10:11 AM
    • Replies: 1
    • Views: 1,365
    05-18-2016, 12:05 PM Go to last post
  45. 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...

    Started by Crisco‎, 03-26-2006 09:11 PM
    • Replies: 0
    • Views: 1,755
    03-26-2006, 09:11 PM Go to last post
  46. Question 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...

    Started by cw08aae‎, 07-24-2010 12:38 AM
    • Replies: 0
    • Views: 2,203
    07-24-2010, 12:38 AM Go to last post
  47. 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...

    Started by PeterVincent‎, 10-31-2007 04:22 PM
    • Replies: 2
    • Views: 2,411
    10-31-2007, 07:01 PM Go to last post
  48. 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...

    Started by trd‎, 03-01-2008 03:04 PM
    • Replies: 0
    • Views: 2,301
    03-01-2008, 03:04 PM Go to last post
  49. 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...

    Started by stillfli69‎, 12-07-2009 09:19 PM
    • Replies: 0
    • Views: 2,602
    12-07-2009, 09:19 PM Go to last post
  50. 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...

    Started by arpix‎, 01-22-2011 07:30 PM
    • Replies: 3
    • Views: 2,248
    01-26-2011, 01:39 AM Go to last post
  51. Help with analysis of multi factor input variables on single outcome target

    Hello all, My name is Brett, and I am a mining engineer from Australia who is 10 years out of school, a bit rusty on the books, and in need of...

    Started by brechristo‎, 02-23-2016 10:50 PM
    • Replies: 0
    • Views: 1,184
    02-23-2016, 10:50 PM Go to last post
  52. 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...

    Started by Ambeon‎, 05-03-2010 01:24 PM
    • Replies: 0
    • Views: 2,372
    05-03-2010, 01:24 PM Go to last post
  53. help with ANCOVA results

    I need to do an ANCOVA for an ecology paper, but as the title says, I need help to report the results. I ran the ANCOVA in Excel using the xlstat...

    Started by iamjedimaster‎, 12-10-2016 07:55 PM
    • Replies: 13
    • Views: 2,605
    12-12-2016, 02:53 PM Go to last post
  54. 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...

    Started by himanshu‎, 10-12-2008 03:41 PM
    • Replies: 3
    • Views: 2,978
    10-16-2008, 12:58 PM Go to last post
  55. Post 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...

    Started by carlidrd‎, 01-21-2012 06:10 PM
    2 groups, anova, comparison
    • Replies: 0
    • Views: 1,441
    01-21-2012, 06:10 PM Go to last post
  56. Question 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...

    Started by bulgarianprincess‎, 04-20-2014 08:50 AM
    anova, confidence interval, gender, statistics, tests of significance
    • Replies: 0
    • Views: 1,454
    04-20-2014, 08:50 AM Go to last post
  57. Help with Anova interpretation

    Hi Guys This is probably simple but I cannot see it. The question is asking how do I determine the number of levels in the anova. Attached is...

    Started by alexi82‎, 10-14-2017 08:12 PM
    • Replies: 2
    • Views: 171
    10-14-2017, 08:20 PM Go to last post
  58. 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...

    Started by gigistats‎, 09-19-2012 07:13 PM
    • Replies: 0
    • Views: 1,557
    09-19-2012, 07:13 PM Go to last post
  59. Help with ANOVAS

    1234567891

    Started by arlucero1‎, 04-15-2013 12:36 AM
    • Replies: 1
    • Views: 1,441
    04-15-2013, 07:21 AM Go to last post
  60. Question 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...

    Started by corvid‎, 04-04-2012 10:22 AM
    • Replies: 0
    • Views: 1,042
    04-04-2012, 10:22 AM Go to last post

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