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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: 196,729
    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: 66,736
    09-30-2005, 09:44 AM Go to last post
  1. Lightbulb SEM: poor fit, large sample, a lot of DF with significant coefficients.

    I am running an analysis of the influence of gender on a number of performance outcomes. My model is also moderated by the gender of the evaluator. ...

    Started by Izabela‎, 05-13-2013 04:17 PM
    a lot of df, model fit, sem
    • Replies: 6
    • Views: 3,210
    05-14-2013, 09:01 PM Go to last post
  2. Likert scale for continuous selection/ranking

    I am new to this forum and have limited statistical background from a business BOS 10 years ago. I need help to find an...

    Started by cubic1‎, 05-14-2013 06:01 PM
    • Replies: 2
    • Views: 1,297
    05-14-2013, 06:23 PM Go to last post
  3. Question 2 way ANOVA post hoc tests SPSS

    :wave:I have been using 2 way ANOVAs SPSS in base 15.0 to look at the effect of two fixed factors (treatment and brain region) on a dependent...

    Started by TRA‎, 11-18-2008 12:54 AM
    • Replies: 4
    • Views: 10,510
    05-14-2013, 02:53 PM Go to last post
  4. 2way anova problem

    hello!!! im studying psychology and i have a problem in my dissertation.in my study i used 3x2 anova in order to examine the effect of colour...

    Started by fel‎, 05-14-2013 12:27 PM
    • Replies: 3
    • Views: 1,253
    05-14-2013, 02:02 PM Go to last post
  5. So confused

    Hi everyone, I have a statistics final coming up and I am always confused with Poisson, Binomial and Hyper-geometric. My teacher specifically...

    Started by SarahWa‎, 05-13-2013 09:13 PM
    • Replies: 5
    • Views: 1,735
    05-14-2013, 11:55 AM Go to last post
  6. Problem to find the right test

    This is my first post and I will do my best to explain everything to you as good as possible. I'm doing a research project for my bachelor exam in...

    Started by Nicklas‎, 05-14-2013 05:33 AM
    • Replies: 1
    • Views: 1,233
    05-14-2013, 08:20 AM Go to last post
  7. compare two Beta coefficience between two different model.

    I am running two regressions, each with the one independent variables (Y) but with two different dependent variables (X1, X2). examply: Y is...

    Started by jinha.yoon‎, 05-13-2013 06:27 PM
    beta coefficients, regression coefficients, statistic
    • Replies: 1
    • Views: 1,889
    05-13-2013, 06:39 PM Go to last post
  8. Meaning of a Statistically Significant Intercept

    Greetings: I have been attempting to define the meaning of a statistically significant intercept in multiple regression. I have searched the Web...

    Started by Tschwartz1007‎, 05-11-2013 04:20 PM
    • Replies: 7
    • Views: 10,062
    05-13-2013, 05:58 PM Go to last post
  9. Statistical Assumptions

    Okay i am not good with stats....thus this is the first part of my paper...I need help with stating the statistical assumption of the test. Also I...

    Started by msartishia‎, 05-12-2013 07:57 PM
    • Replies: 1
    • Views: 1,064
    05-13-2013, 02:54 PM Go to last post
  10. Thumbs up Please homework help

    Hi everyone , can you help me for my statistic homework ? Assume that your aim is to estimate the average height of the adult men in a city....

    Started by kamilbayirli‎, 05-11-2013 09:22 AM
    • Replies: 2
    • Views: 1,190
    05-13-2013, 10:40 AM Go to last post
  11. Please help!!

    Hello , I started a Statistics class a few weeks ago and i'm still pretty lost. Could someone explain to me how I should resolve this following...

    Started by Success‎, 05-13-2013 05:28 AM
    average, median, percentage, statistics
    • Replies: 2
    • Views: 1,329
    05-13-2013, 08:21 AM Go to last post
  12. Relation algebra - matrix construction

    Hi, In a DEA-software I have, I must construct logical weights. These weights are constructed as a matrix solution of relationships between the...

    Started by hanke83‎, 05-13-2013 01:52 AM
    matrix, relation algebra, weight construction
    • Replies: 0
    • Views: 917
    05-13-2013, 01:52 AM Go to last post
  13. Question need help: ordinal data used as predictor for linear multiple regression analysis??

    Part of my thesis tries to investigate the extent to which students "test Score" on the topic of electrical circuits in physic can be predicted from...

    Started by afful‎, 05-12-2013 06:08 PM
    • Replies: 2
    • Views: 1,163
    05-12-2013, 11:35 PM Go to last post
  14. Question Motivational and Behavioral Classes for User Segmentation

    Hi everyone, In the course of a research project with a sample size of > 1000, I intend to first group users in unique motivation/motive classes....

    Started by sportstechie‎, 05-12-2013 08:48 AM
    clustering, segmentation
    • Replies: 1
    • Views: 1,023
    05-12-2013, 10:50 AM Go to last post
  15. Likelihood Ratio Statistic & P-value

    Good day everyone, and thank you for taking the time to look at my question. 1. The problem statement, all variables and given/known data ...

    Started by verdict‎, 05-12-2013 09:16 AM
    • Replies: 2
    • Views: 2,003
    05-12-2013, 09:28 AM Go to last post
  16. help with the decision about my Master....

    Hi everyone... my name is John and i am from Greece.. i recently graduated from University of Pireaus, department of Statistics and Insurance...

    Started by johnzav‎, 05-10-2013 10:56 AM
    • Replies: 2
    • Views: 1,179
    05-12-2013, 09:11 AM Go to last post
  17. Test for Independence

    Use X^2 Test for Independence at the 5% L.O.S. Show your hypothesis, the test, state your conclusion... Show the matrix of the expected values and...

    Started by PSG‎, 05-12-2013 02:05 AM
    • Replies: 2
    • Views: 1,269
    05-12-2013, 09:00 AM Go to last post
  18. Exclamation statistical test for a very small sample?

    Hi everyone :wave:, I stumbled across this forum after some googling, and I must say very useful stuff you got here. I have a question about...

    Started by studentelle‎, 05-11-2013 02:10 PM
    • Replies: 2
    • Views: 1,888
    05-12-2013, 07:39 AM Go to last post
  19. Exclamation A problem of several dummies in regression(Excel)

    Hello, everyone! :) In Excel I tried to make a regression equation with several dummies. The task is: Include the manufacturer in a multiple...

    Started by Lisa92‎, 05-12-2013 06:29 AM
    • Replies: 0
    • Views: 5,027
    05-12-2013, 06:29 AM Go to last post
  20. Question Propagation of uncertainity

    I'm a cell biologist and struggling with a problem concerning the propagation of uncertainity. Since I'm no expert in statistics, I'll just start...

    Started by rogerbrot‎, 05-07-2013 04:20 AM
    • Replies: 1
    • Views: 1,593
    05-12-2013, 02:50 AM Go to last post
  21. Testing for "Compensatory Adaption" or "Compensatory Substitution" effect

    Hello Folks! Background: ----------------------------------------------- I surveyed telecommuters. Among other variables, I measured the...

    Started by kathy_‎, 05-11-2013 03:34 PM
    • Replies: 0
    • Views: 1,291
    05-11-2013, 03:34 PM Go to last post
  22. Mann Whitney U - P Value of 0.0000

    Good Afternoon all, I am using a Mann Whitney U to compare two populations the data ranges from (-2 to 2). I have already done this on 4...

    Started by n1477‎, 05-09-2013 07:52 AM
    mann-whitney test, mann-whitney u, p value
    • Replies: 9
    • Views: 9,477
    05-11-2013, 02:33 PM Go to last post
  23. Least Regression Line, The Coefficient of Deter....

    Values of Car($1000) 20,10,26,12,19,22,13,16,25,8,10 Student GPA. 2.5 3.5 2.2 3.7 2.7 3.0 2.9 3.2 2.2 3.8 3.7 b)Give the Equation for the...

    Started by PSG‎, 05-11-2013 12:16 AM
    • Replies: 2
    • Views: 1,776
    05-11-2013, 01:26 PM Go to last post
  24. Clusters building from series of financial data

    Hi everyone, First of all I need to tell you that I don't know many things about statistics - I work in finance. Currently I need to...

    Started by costinchivu‎, 05-11-2013 04:54 AM
    cluster, clusters, finance, share
    • Replies: 1
    • Views: 1,187
    05-11-2013, 06:28 AM Go to last post
  25. comparing two simple random variables

    Hallo! My Homework subject: compare two independent random variables X=(X1, , Xn ) and Y=(Y1, , Ym) drawn from a normal distribution and...

    Started by Nadoush‎, 05-11-2013 05:22 AM
    • Replies: 0
    • Views: 1,722
    05-11-2013, 05:22 AM Go to last post
  26. shared variance

    can anybody give me simple definition of this concept? Is it the same as covariance?

    Started by godfather‎, 06-05-2007 02:44 AM
    • Replies: 2
    • Views: 19,516
    05-10-2013, 12:02 PM Go to last post
  27. serious variable confusion

    Ok, so the problem I'm having is that my tutor has been incredibly unclear about variables for the report we have to write. In class, she said X...

    Started by JesseJames‎, 05-08-2013 05:45 AM
    • Replies: 3
    • Views: 2,149
    05-10-2013, 06:13 AM Go to last post
  28. [Ordinary Least Squares Regression By Hand] Explanation help needed

    Hi, I'm working on a problem that requires doing OLS by hand. I have the answers but I'm trying to understand why it uses certain formulas, which...

    Started by ctfdacow‎, 05-09-2013 09:06 PM
    • Replies: 3
    • Views: 1,756
    05-10-2013, 02:37 AM Go to last post
  29. free throw problem

    If a free throw shooter makes 80 out of 100, what is the probability that he makes atleast 85 free throws next time. I had one more question as...

    Started by Jeremy9653‎, 05-09-2013 12:35 AM
    • Replies: 1
    • Views: 1,147
    05-09-2013, 10:37 PM Go to last post
  30. Comparing means from two weighted data sets

    Hi, I'm hoping I can get help with a problem. I have two survey data sets, one from 2006 and one from 2013, and I'd like to see whether there's...

    Started by Modame‎, 05-09-2013 12:41 PM
    • Replies: 0
    • Views: 1,615
    05-09-2013, 12:41 PM Go to last post
  31. Regression Poisson

    Hi :wave:, first of all, sorry for my english, I'm not english. My question is a quite specific of a problem. I'm doing a regression of a Poisson...

    Started by arodriguez‎, 05-03-2013 05:36 AM
    maximum likehood, poison regression, regression
    • Replies: 6
    • Views: 2,283
    05-09-2013, 04:08 AM Go to last post
  32. Throwing die question

    I have a question I was going to see if anyone could explain to me. If you roll a die 10 times, what is the probability that you roll a 6 at...

    Started by Jeremy9653‎, 05-08-2013 10:44 PM
    • Replies: 1
    • Views: 1,146
    05-08-2013, 10:49 PM Go to last post
  33. Can R-squares from simple linear regression models (for the same regressand) summed

    Hi! I am Tusawar. I will be thankful to the person extracting some time to resolve my problem. PROBLEM Suppose we have the following 3 simple...

    Started by tusawar‎, 05-08-2013 05:47 PM
    • Replies: 4
    • Views: 1,518
    05-08-2013, 06:19 PM Go to last post
  34. help with how to analyse my stats!

    heya, I was hoping someone could give me some advice on the best way to carry out my stats analysis in my researc hproject. I will be showing...

    Started by vanzok‎, 04-22-2013 09:27 AM
    • Replies: 5
    • Views: 1,570
    05-08-2013, 05:55 PM Go to last post
  35. Which statistical procedure to use (given standard deviations and means)?

    Can someone please help me with this? Which statistical procedure could I use, and how could I set this up? A company operates four machines during...

    Started by statstand1991‎, 05-08-2013 04:25 PM
    means, standard deviation, t test, z test
    • Replies: 0
    • Views: 1,712
    05-08-2013, 04:25 PM Go to last post
  36. Basic Question about Weight Average

    This is a pretty simple question and I'm wondering how to go about finding a solution. I have the following data. ttt =...

    Started by amathew‎, 05-08-2013 10:20 AM
    • Replies: 0
    • Views: 883
    05-08-2013, 10:20 AM Go to last post
  37. Comparing fitness in populations under two schemes

    I have two populations that vary in their ability to complete a task. At the end of each simulation run the mean of each population's fitness is...

    Started by killbot2000‎, 05-08-2013 08:40 AM
    • Replies: 4
    • Views: 1,486
    05-08-2013, 09:50 AM Go to last post
  38. Help finding confidence interval.

    I've been struggling with this problem for some time. Any help would be appreciated. A superintendent of a school district believes that the...

    Started by Lostinstants‎, 05-07-2013 07:05 PM
    • Replies: 1
    • Views: 828
    05-08-2013, 12:40 AM Go to last post
  39. T-test vs.Anova Help please!

    I've had this data for so long and I just can't figure out how to analyze it. Please help. I have two groups of students; one group mentored at one...

    Started by Bit4007‎, 05-07-2013 09:28 PM
    group comparison, mentoring, stai
    • Replies: 1
    • Views: 978
    05-07-2013, 11:41 PM Go to last post
  40. Finding the obtained f from t.

    Moo. Hey now brown cow.

    Started by tte2004‎, 05-06-2013 09:10 PM
    • Replies: 4
    • Views: 1,816
    05-07-2013, 11:07 PM Go to last post
  41. Conservative Confidence Interval

    Assume X~f(x;θ), θ>0 where f(x;θ)=x^(-θ) - (x+2)^(-θ). Derive a conservative one-sided upper 95% confidence interval for θ if x=5 is observed. ...

    Started by backes‎, 05-07-2013 05:58 PM
    • Replies: 2
    • Views: 1,239
    05-07-2013, 06:53 PM Go to last post
  42. statistical analysis technique

    Hi all, looking for some help in best analysis tool to use. I want to test the effects of multiple independent variables on one dependent...

    Started by projectstats1‎, 05-07-2013 04:41 PM
    • Replies: 2
    • Views: 1,563
    05-07-2013, 04:59 PM Go to last post
  43. Z value

    I'm working on a problem that requires me to make a conclusion on possible defective products. I've done z values before but have not come across one...

    Started by silent54‎, 05-07-2013 12:42 PM
    • Replies: 5
    • Views: 1,705
    05-07-2013, 04:29 PM Go to last post
  44. Need help with a statistics problem.

    I need to find the best time to goto the bus stop based on 123 Observable Data's. The data is based on two variables. Weather and Time The...

    Started by wowgad‎, 05-07-2013 02:56 PM
    • Replies: 1
    • Views: 1,192
    05-07-2013, 03:13 PM Go to last post
  45. Principle Components Analysis and Cluster Analysis

    Hi, I was wondering if you could all hep me decode the difference between both PCA and cluster analysis. As far as I can tell, PCA aims...

    Started by QueenOfStats‎, 05-06-2013 08:34 AM
    • Replies: 4
    • Views: 2,479
    05-07-2013, 03:12 PM Go to last post
  46. z-score formula when mean is not a solid value?

    I'm having trouble setting up my formula because in this specific problem it's saying the mean is "greater than" 35. I know how to set up the formula...

    Started by deepasblue‎, 05-07-2013 06:03 AM
    • Replies: 3
    • Views: 1,665
    05-07-2013, 11:09 AM Go to last post
  47. tests for normal data

    Hi, I posted some like my questions, but I didn't stay very clearly with my problem. I have some rows of data like 1 0 2 1 3 0 I need...

    Started by slavia‎, 04-28-2013 09:10 AM
    2 Pages
    1 2
    • Replies: 25
    • Views: 6,689
    05-07-2013, 10:27 AM Go to last post
  48. Nonparametric 3 factor ANOVA

    I am trying to find a nonparametric equivalent for 3 within subject factors ANOVA test. I checked Friedman test, but all the examples that I found...

    Started by aligoles‎, 08-14-2010 02:46 PM
    • Replies: 3
    • Views: 10,270
    05-07-2013, 10:14 AM Go to last post
  49. Nonparametric alternative for Spearman's rho for correlation strength?

    My question is as simple as it may be difficult: is there any other nonparametric test besides Spearman's rho to compute the correlation strength...

    Started by FrankC‎, 05-06-2013 11:34 PM
    mysql, nonparametric, ranking, spearman's rho
    • Replies: 2
    • Views: 1,679
    05-07-2013, 05:39 AM Go to last post
  50. what statistical test should I use?

    Hello everybody! The poor statistician that I am needs your help! I want to realize a survey based on Likert questions. What i want to know is...

    Started by pingu‎, 05-06-2013 06:40 AM
    • Replies: 3
    • Views: 1,569
    05-07-2013, 02:31 AM Go to last post
  51. OC Curve Program

    One of my friends has asked me to help him write a program to calculate the "n" and "c" values (sampling size, accept number), only given...

    Started by statsman2013‎, 05-06-2013 07:44 PM
    accept number, oc curve, programming, sampling, statisics
    • Replies: 0
    • Views: 1,768
    05-06-2013, 07:44 PM Go to last post
  52. A bit basic but....Help!

    Honestly this problem put me into a stump. I'm used t having set of data values, but now I'm just confused on this. I am just starting statistics so...

    Started by exkingb12‎, 05-06-2013 06:10 PM
    • Replies: 1
    • Views: 3,227
    05-06-2013, 06:48 PM Go to last post
  53. Calculating Probability from Mean and standard deviation

    Hello, im having difficulty in solving the following problem, Could anyone please solve this. Lifts usually have signs indicating their maximum...

    Started by ranish293‎, 05-02-2013 09:56 PM
    • Replies: 2
    • Views: 2,829
    05-06-2013, 01:32 PM Go to last post
  54. coefficient of variation

    I would like to check the reliability of my test retest study. Different raters measured height and weight twice (visits 1 week apart) on 5...

    Started by tascja‎, 05-02-2013 10:39 AM
    • Replies: 1
    • Views: 1,518
    05-06-2013, 11:58 AM Go to last post
  55. Repeated Measures ANCOVA - questions on covariates and output

    Hello everybody, I need some help with a RM ANOVA or ANCOVA. I have to help an intern at my department with her analyses but don't the answers...

    Started by Sabine‎, 05-06-2013 10:46 AM
    • Replies: 0
    • Views: 1,527
    05-06-2013, 10:46 AM Go to last post
  56. 2 x 2 data, statistical test

    Hi, This is a simple question, but what is the appropriate statistical test for the following situation. ...

    Started by lgangs‎, 04-04-2013 09:28 PM
    • Replies: 3
    • Views: 1,783
    05-06-2013, 06:28 AM Go to last post
  57. Estimation and Hypothesis Testing

    Hey, I'm new here, hope this is the right spot for this. I was very good at understanding this information when we moved in sections because I knew...

    Started by RichAshford21‎, 05-05-2013 05:16 PM
    • Replies: 1
    • Views: 1,147
    05-05-2013, 05:17 PM Go to last post
  58. Fractional Factorial Experiment Design

    I know that to get the alias rows with the main factor effects, I use mod 2 multiplication with the main effects and the elements of the defining...

    Started by APOCooter‎, 05-05-2013 01:06 PM
    • Replies: 0
    • Views: 880
    05-05-2013, 01:06 PM Go to last post
  59. standardised indirect effects in multimediational analysis

    Hi I have been using Andrew Hayes PROCESS to calculate indirect effects in a multimediational model. Is there a way to calculate standardized or...

    Started by rosenmarsh‎, 05-05-2013 07:17 AM
    • Replies: 0
    • Views: 1,770
    05-05-2013, 07:17 AM Go to last post
  60. Two different populations?

    I posted a while ago about a project that I had to do and I think I got it but I have a question. I'm doing it on graduation rates in America...

    Started by Samuraiedge‎, 05-04-2013 10:34 AM
    • Replies: 1
    • Views: 1,527
    05-05-2013, 01:56 AM Go to last post

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