1. Announcement:
    Want access to a chatbox?
    Dason ‎(Devorador de queso)
    05-10-2017
    Views:
    1,767
+ Post New Thread
Page 11 of 294 FirstFirst 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 61 111 ... LastLast
Threads 601 to 660 of 17582

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: 196,509
    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: 66,594
    09-30-2005, 09:44 AM Go to last post
  1. Geometric Distribution MLE

    Consider carrying out a sequence of Bernoulli trials where the probability of success is pi in each trial. We stop when the first success occurs. Let...

    Started by jamesmartinn‎, 01-12-2010 05:34 PM
    • Replies: 3
    • Views: 10,870
    01-14-2010, 10:37 AM Go to last post
  2. Categorical and ordinal scale....chi square?

    Hi I am seeking help on this issue. I have a categorical variable namely gender (male x female) and an ordinal variable about perception of a...

    Started by Mohamed Afifi‎, 08-20-2012 04:12 PM
    2 Pages
    1 2
    • Replies: 18
    • Views: 10,851
    08-24-2012, 01:28 PM Go to last post
  3. Scaled data vs. normalized data

    1.Are they the same? 2.Why we need to scale the data especially when we want to compare the dist of the data for (say) 2 samples? Some say to make...

    Started by tsukiko‎, 03-13-2010 10:55 PM
    • Replies: 3
    • Views: 10,843
    03-15-2010, 07:27 AM Go to last post
  4. Help with comprehending output from proc reg

    So I just ran my very first regression and the data output is pasted below (I've also attached the .txt file) ...

    Started by david_q‎, 02-11-2012 01:12 PM
    3 Pages
    1 2 3
    • Replies: 32
    • Views: 10,834
    02-13-2012, 02:11 PM Go to last post
  5. How do determine min sample size for auditing medical claims by medical records?

    I have a sampling methodology question I'm in need some statistical expertise with: I'm trying to determine how to calculate the minimum sample...

    Started by alfields326‎, 05-24-2010 05:26 PM
    • Replies: 3
    • Views: 10,820
    08-17-2010, 10:15 AM Go to last post
  6. Help with predicted value problem using regression equation

    Use the computer display to answer the question. A collection of paired data consists of the number of years that students have studied Spanish and...

    Started by maharriso‎, 11-13-2006 03:00 PM
    • Replies: 0
    • Views: 10,817
    11-13-2006, 03:00 PM Go to last post
  7. Degrees of freedom for t-test for difference of proportions?

    I'm doing a t-test for the difference between two proportions in a small sample context where the two sample sizes add up to less than 30. I'm...

    Started by FluffyPuff‎, 12-11-2010 11:10 PM
    • Replies: 4
    • Views: 10,809
    12-13-2010, 12:10 AM Go to last post
  8. interpreting Likert scale

    Hello! So the research is about motivations on microblogging. A 5-point Likert scale was used. 1=Never; 5=Always I have the mean, median,...

    Started by oct23ria‎, 12-02-2010 03:15 AM
    • Replies: 3
    • Views: 10,801
    12-04-2010, 03:32 AM Go to last post
  9. MGF of lognormal distribution

    Let x ~ N (μ,σ^2 ) and consider the lognormal r.v. y= e^x. Given the MGF of the normal distribution M_x (t)= e^((μt+0.5σ^2 t^2)). How to compute...

    Started by zulkfal‎, 10-08-2009 12:54 AM
    • Replies: 2
    • Views: 10,797
    10-08-2009, 12:46 PM Go to last post
  10. Comparing distributions, Two-Sample KS-test and Bonferroni

    Hi there, The following is my problem for which I’m grateful to have any advice/opinions: I measured the distances animals moved in 3 different...

    Started by Soldanella‎, 02-19-2006 04:51 PM
    • Replies: 1
    • Views: 10,790
    02-19-2006, 05:14 PM Go to last post
  11. logist regression - standardized estimates

    Hello, can anyone help me with a brief explanation? :confused: Usually I use the "stb" model option while running the proc logistic in sas to...

    Started by conni‎, 06-14-2011 04:54 AM
    • Replies: 6
    • Views: 10,777
    06-15-2011, 05:17 AM Go to last post
  12. SPSS Output: Increasing "R Square Change" Value

    Hello, I have preformed a stepwise regression on my data set using SPSS. In the out put table the "R Square Change" value for the second model...

    Started by BBBB‎, 07-02-2012 07:18 PM
    r square, regression, spss, stepwise
    • Replies: 3
    • Views: 10,773
    07-03-2012, 05:02 PM Go to last post
  13. Unequal group sizes and chi square test of independence

    I began working on a project that compares birth outcomes of women in a case management program (n = 270) to the birth outcomes of the general...

    Started by JCole‎, 08-12-2013 03:16 PM
    chi square, non parametric, unequal sample sizes, very large sample size
    • Replies: 1
    • Views: 10,760
    10-21-2013, 05:45 PM Go to last post
  14. Is normal dist OK for these count data?

    Hello, I am modelling some count data (ANCOVA). I use R for statistical computing. I am not sure if I must use a glm with poisson errors.

    Started by stweb‎, 09-01-2013 05:43 AM
    ancova, normal, poisson
    • Replies: 3
    • Views: 10,748
    09-03-2013, 05:49 AM Go to last post
  15. Help!!!!!!! Comparing Two Distribution - Kolmogorov-Smirnov

    Hello, I am comparing two distributions by using the Kolmogorov-Smirnov method, but I want to know how different is one distribution to the other?...

    Started by Shamvir‎, 11-26-2011 11:18 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 10,744
    12-06-2011, 05:09 PM Go to last post
  16. lognormal

    How do I find the p50 value in a lognormal distribution given p10 and p90 using excel/@RISK ??

    Started by stat_RA‎, 01-14-2011 04:09 PM
    • Replies: 7
    • Views: 10,739
    01-15-2011, 05:59 AM Go to last post
  17. How to convert Likert scale scores into interval/ratio

    How can I convert my data obtained on Likert scale into the scores on which I can apply Correlation, Regression and Factor Analysis?

    Started by Dr.Appalayya‎, 10-31-2009 09:10 AM
    • Replies: 2
    • Views: 10,725
    10-31-2009, 09:08 PM Go to last post
  18. Degree of freedom for error

    I have performed an ANOVA with three variables on XLSTAT, and I am looking for the freedom of error for each indvidual main and interaction effect. ...

    Started by Joan‎, 01-13-2009 09:39 AM
    • Replies: 1
    • Views: 10,714
    01-13-2009, 10:57 AM Go to last post
  19. Usage of the mean with ordinal data

    WARNING: This will be a long post! Also, I am no statistics expert, so I tried to explain myself as best as possible. I will be entering grad...

    Started by intomarketing‎, 11-06-2007 05:46 PM
    • Replies: 2
    • Views: 10,691
    11-07-2007, 10:38 PM Go to last post
  20. True experiment requirements

    I know this is more of a R&D question, but it is for a statistics class. If subjects are randomized to 1 of 4 groups, none of which is a control...

    Started by ceperras‎, 06-23-2008 04:56 PM
    • Replies: 4
    • Views: 10,680
    07-07-2008, 03:40 PM Go to last post
  21. Question Difference between one-tail and two-tail t test

    Hey I am a newbie here. Think in real simple terms. I am having trouble understanding the differnece between one-tail and two-tail t tests....

    Started by cheywind‎, 11-15-2008 03:34 PM
    • Replies: 2
    • Views: 10,678
    11-16-2008, 09:55 AM Go to last post
  22. Rejection Region

    I had a question on an exam recently that I got correct by accident. The question is as follows: In testing H=50 and H>50, suppose we reject H...

    Started by nyrtofa‎, 05-09-2008 02:26 AM
    • Replies: 2
    • Views: 10,670
    05-09-2008, 07:13 PM Go to last post
  23. Intra-individual variability measure

    I'm looking for a simple means for expressing intra-individual variability. Let's say Participant 1 has 5 beers on one occasion, 10 beers on another...

    Started by JayBo‎, 04-12-2011 12:26 AM
    • Replies: 1
    • Views: 10,667
    04-12-2011, 06:28 PM Go to last post
  24. mode of the chi-square distribution

    I don't understand why the mode of the chi-square dist is df-2. With three categories, the mode would be 1, that is, the distribution would have its...

    Started by joeygor‎, 10-04-2010 09:47 PM
    • Replies: 10
    • Views: 10,655
    11-16-2010, 11:42 PM Go to last post
  25. Probabiloty and distribution help

    1. For quality control purposes, a company that manufactures copper sheets routinely takes samples from its production process. Since its product is...

    Started by Booknerd425‎, 05-30-2015 05:50 PM
    • Replies: 2
    • Views: 10,642
    05-31-2015, 01:26 PM Go to last post
  26. Forward vs. backward selection. Advantages and Disadvantages

    I guess there are automated methods but I am referring to manual selection. Like: first finding out which variables have significant individual...

    Started by StatsClue‎, 04-06-2012 03:13 PM
    • Replies: 4
    • Views: 10,637
    04-07-2012, 12:01 PM Go to last post
  27. Delphi study / 9 point Likert scales

    We are conducting a Delphi study. Each statement in our questionnaire is scored on a nine point likert scale ranging from 1(strongly disagree) to...

    Started by veena‎, 12-02-2006 12:14 PM
    • Replies: 3
    • Views: 10,636
    12-02-2006, 03:53 PM Go to last post
  28. please i need help in solving these questions

    hi all, please can anyone help me :( 1. The internal auditing staff of an local manufacturing company performs a sample audit each quarter to...

    Started by help101‎, 12-10-2011 02:56 PM
    2 Pages
    1 2
    • Replies: 21
    • Views: 10,630
    12-10-2011, 04:57 PM Go to last post
  29. Goodness of Fit Vs Predictive Ability

    Hello, What is the difference between predictive ability and goodness of fit? Ir ead that c statistic and concordance, discordance are neasure of...

    Started by zarasandreas‎, 02-22-2010 06:08 PM
    • Replies: 0
    • Views: 10,625
    02-22-2010, 06:08 PM Go to last post
  30. post hoc test for chi-square

    ok this might be a newbie question but lets say I have data that I have cross tabbed for location and level of agreement. A ...

    Started by apdragon‎, 12-22-2011 12:27 AM
    • Replies: 6
    • Views: 10,622
    12-22-2011, 06:07 PM Go to last post
  31. Question Homework help (the empirical rule)??

    Hello, Can anyone help me with this problem? SAT math scores have a bell shaped distribution with a mean of 515 and a standard deviation of 114. ...

    Started by ksinclair‎, 10-29-2010 11:47 PM
    • Replies: 1
    • Views: 10,600
    10-30-2010, 01:22 AM Go to last post
  32. Hypothesis Test concerning difference in proportion- Where did i go wrong???

    Hey all, The answer I get is not amoung the answers offered. I'd appreciate some help in telling me where I went wrong!! In order to determine...

    Started by SunChaser‎, 12-17-2007 04:46 AM
    • Replies: 7
    • Views: 10,598
    12-18-2007, 04:35 PM Go to last post
  33. Interaction is significant but posthoc is not significant

    I'm running a mixed model ANOVA with 16 levels (2X8). The first factor is gender with 2 levels (between subject factor) and second factor is time...

    Started by binamoneshan‎, 01-20-2009 01:10 AM
    • Replies: 5
    • Views: 10,591
    01-20-2009, 09:30 PM Go to last post
  34. Wilcoxon signed rank test with unequal sample size?

    Hello all, I would need a two sample unequal sample size paired nonparametric test to compare two distributions. I believe Wilcoxon signed rank...

    Started by Tikkuhirvio‎, 11-09-2010 02:44 PM
    • Replies: 3
    • Views: 10,548
    11-10-2010, 10:11 AM Go to last post
  35. Sig 1 tailed is ,000. What does this mean

    For my studie i made a correlation matrix with a moderating value of man and women. For women the sig. 1 tailed came out with 0,000 I am not sure...

    Started by moeeeee‎, 01-15-2012 10:35 AM
    • Replies: 2
    • Views: 10,515
    01-15-2012, 01:46 PM Go to last post
  36. Understanding acf plots produced from ccf function in R

    I am trying to understand the lead-lag relation between two series. So, I used CCF() function from R. The code is: ccf(drop((S_X)),drop((S_Y)))...

    Started by sak‎, 04-25-2013 08:59 AM
    • Replies: 3
    • Views: 10,515
    04-25-2013, 08:40 PM Go to last post
  37. calculate the average of the standard error?

    Hi Folks, I have two estimates that I would like to average: N1 = 68.7 (SE = 13.6) N2 = 81.6 (SE = 15.5) Average N = 75.2 (SE = ?). Can...

    Started by gnfishin21‎, 10-13-2008 05:57 PM
    • Replies: 2
    • Views: 10,495
    07-19-2011, 11:59 AM Go to last post
  38. Comparing correlations

    I've asked caregivers to complete three scales relating to the same group of persons with an intellectual disability. I'll call the scales A, B, and...

    Started by JoeMiller88‎, 09-02-2009 10:14 PM
    • Replies: 2
    • Views: 10,495
    06-01-2010, 07:13 AM Go to last post
  39. 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: 10,494
    05-14-2013, 02:53 PM Go to last post
  40. Pre-ANOVA normality tests - how to handle "outliers" in normality assessment/ANOVA?

    Hello! I am working on analyzing some biological data for a journal manuscript submission and cannot seem to find the answer to my stats question on...

    Started by spence19‎, 07-26-2011 08:15 PM
    • Replies: 7
    • Views: 10,492
    09-27-2011, 10:46 PM Go to last post
  41. When to use 5pt vs. 7pt Likert Scale?

    I am working a survey for physicians, and am planning on utilizing a Likert Scale for an assessment. I've heard different things from a few...

    Started by nycIHC‎, 11-18-2008 01:56 PM
    • Replies: 4
    • Views: 10,474
    11-20-2008, 03:07 PM Go to last post
  42. ordered array vs. stem and leaf

    I am a beginner stats taker and terrible at math. my book does not explain this well: When is it best to use an ordered array vs. stem and leaf?...

    Started by tdezao@acad.umass.edu‎, 02-02-2011 01:37 AM
    leaf, ordered array, stem
    • Replies: 0
    • Views: 10,456
    02-02-2011, 01:37 AM Go to last post
  43. Shapiro-Wilks Test

    Hi all I know that when doing a Shapiro-Wilks Test you need a W value close to 1 for normality to be adequately met. But how close is close? For...

    Started by Labtec‎, 05-03-2009 06:00 PM
    • Replies: 6
    • Views: 10,449
    05-05-2009, 11:08 AM Go to last post
  44. How do you find percentiles for Gamma and Poisson Distributions

    Hi, I want to find the value of the 90th percentile for two sets of data that I have. One set of data follows a Gamma Distribution, the other...

    Started by onmyown‎, 07-02-2012 11:12 PM
    • Replies: 2
    • Views: 10,446
    07-03-2012, 10:29 PM Go to last post
  45. variance of the ratio (Y/X)

    I found the formla of the variance of two ratios y = interest variable x = auxiliar variable N = population size n = sample size r = ∑yi/∑xi...

    Started by thornwald‎, 07-05-2011 02:34 AM
    • Replies: 2
    • Views: 10,431
    07-07-2011, 01:10 AM Go to last post
  46. [SOLVED] Suggest method of analysis

    Hi, i have two sets of data one control and the other treated. Pl. suggest a best method/s of analysis to effectively study the treatment effects....

    Started by Sunil Neelam‎, 09-30-2008 12:06 PM
    • Replies: 6
    • Views: 10,417
    10-02-2008, 08:28 AM Go to last post
  47. t-test with log-transformed data

    I am working with cost data which is highly right skewed and comparing the costs between 2 groups. I deemed it best to perform a log transformation...

    Started by lancearmstrong1313‎, 06-22-2012 07:24 AM
    • Replies: 1
    • Views: 10,407
    06-22-2012, 11:45 AM Go to last post
  48. Normal Distribution and Sampling

    A waitress believes the distribution of her tips has a model that is slightly skewed to the left, with a mean of 10.50 and a standard deviation of...

    Started by G-nerd‎, 03-02-2012 06:19 PM
    • Replies: 2
    • Views: 10,376
    03-02-2012, 09:30 PM Go to last post
  49. Smile Trend Analysis

    What are the degrees of freedom in trend analysis? And what goes in the denominator? Does it matter what type of trend analysis you are doing, or...

    Started by amanning‎, 12-06-2005 10:49 PM
    • Replies: 4
    • Views: 10,354
    12-06-2005, 11:17 PM Go to last post
  50. p-value (linear regression in R)

    Hi, I am trying to answer a question about linear regression. I have to do a linear regression between xaa and aus variables and find the...

    Started by petros20‎, 05-06-2011 10:01 AM
    linear, regression
    • Replies: 5
    • Views: 10,339
    05-07-2011, 11:12 AM Go to last post
  51. ANOVA, assumptions mandatory?

    So on numerous websites, which of course we can trust completely ;) I've run across arguments that the normality and homogeneity assumptions for...

    Started by jawon‎, 09-03-2008 02:29 PM
    • Replies: 13
    • Views: 10,329
    09-12-2008, 07:44 AM Go to last post
  52. Regression - Assumption of independence

    Hello, One assumption of linear regression is that the Y values are independent. This means that in drawing the sample, the values of Y observed...

    Started by zarasandreas‎, 01-08-2010 01:11 PM
    • Replies: 1
    • Views: 10,318
    01-08-2010, 01:26 PM Go to last post
  53. confused about sample mean vs sampling distribution mean

    I got this true/false question Consider an infinite population with a mean of 100 and a standard deviation of 20. A random sample of size 64 is...

    Started by claudius‎, 02-18-2011 05:17 PM
    • Replies: 6
    • Views: 10,309
    02-18-2011, 08:06 PM Go to last post
  54. statistics “with technology” and “without technology”

    In the answer section of my statistics book it lists the answer “with technology” and “without technology”. What and why is there a difference? Is...

    Started by mxer829‎, 11-02-2007 11:51 AM
    • Replies: 0
    • Views: 10,304
    11-02-2007, 11:51 AM Go to last post
  55. Question x-bar distribution

    Question: Is the sampling distribution of x-bar always normally distributed, regardless of the size of the sample n? Answer: No Is this...

    Started by 3sacharm‎, 11-19-2010 01:12 PM
    • Replies: 2
    • Views: 10,300
    11-19-2010, 04:30 PM Go to last post
  56. Question significant difference between three proportion??how??

    hello thank you for best sit. I have a question. when we have just three proportion how we do say there are significant difference between them?...

    Started by hol‎, 05-21-2011 12:34 PM
    significant2
    • Replies: 7
    • Views: 10,272
    05-23-2011, 12:47 AM Go to last post
  57. CFA vs. SEM

    I hypothesized a 4-factor model for my data and SEM supported this, but CFA suggested 5 factors (see results below). Why might this difference be and...

    Started by SarahKS‎, 11-02-2011 03:32 PM
    • Replies: 10
    • Views: 10,271
    11-03-2011, 06:33 PM Go to last post
  58. R question/Command to calculate Confidence Interval of a Mean?

    Does anyone know what command I should use in R for a confidence interval test on a one-sample mean? I know the command to estimate the...

    Started by parsec2011‎, 01-04-2012 07:53 AM
    • Replies: 2
    • Views: 10,263
    01-04-2012, 08:58 AM Go to last post
  59. Question Confidence Interval and P-value method

    Here is the question and it's actually 2 parts. Use the confidence interval method: For a sample of 25 items from a normally distributed...

    Started by DaynaDos‎, 04-01-2008 08:46 AM
    • Replies: 3
    • Views: 10,253
    04-01-2008, 11:43 AM Go to last post
  60. 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: 10,247
    05-07-2013, 10:14 AM Go to last post

+ Post New Thread
Page 11 of 294 FirstFirst 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 61 111 ... LastLast

Thread Display Options

Use this control to limit the display of threads to those newer than the specified time frame.

Allows you to choose the data by which the thread list will be sorted.

Order threads in...

Note: when sorting by date, 'descending order' will show the newest results first.

Icon Legend

Contains unread posts
Contains unread posts
Contains no unread posts
Contains no unread posts
More than 15 replies or 300 views
Hot thread with unread posts
More than 15 replies or 300 views
Hot thread with no unread posts
Closed Thread
Thread is closed
Thread Contains a Message Written By You
You have posted in this thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts






Advertise on Talk Stats