1. Announcement:
    Want access to a chatbox?
    Dason ‎(Devorador de queso)
    05-10-2017
    Views:
    1,942
+ Post New Thread
Page 17 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 31 32 33 34 35 36 67 117 ... LastLast
Threads 961 to 1020 of 17595

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: 197,217
    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: 66,990
    09-30-2005, 09:44 AM Go to last post
  1. Question Mann Whitney u test- Interpretation help?

    Hi I have conducted a Mann Whitney u test to test to see if there is a difference between one of my variables and gender. The test shows there is...

    Started by Pippy‎, 09-08-2012 06:44 AM
    • Replies: 3
    • Views: 8,226
    09-10-2012, 02:45 AM Go to last post
  2. Sample Overlap - what is the effect on stat tests?

    A survey was done. 1000 respondents. 250 were younger males. 250 were younger females. 250 were older males. 250 older were females. I want to...

    Started by egret‎, 09-14-2011 03:22 PM
    • Replies: 3
    • Views: 8,225
    09-16-2011, 06:11 AM Go to last post
  3. Question How robust is an anova?

    This is more of a theoretical question and probably a very easy one at that. We are having some disagreements in our group about how to analyze the...

    Started by yanky‎, 08-04-2010 03:53 AM
    • Replies: 3
    • Views: 8,223
    08-05-2010, 03:31 AM Go to last post
  4. Question Intra-class correlation for test-retest

    I have done test retest relaibility of a 25 item, four point scale over a two week interval. I have analysed it with an intra-class correlation with...

    Started by leodom‎, 08-03-2008 08:00 AM
    • Replies: 2
    • Views: 8,220
    08-11-2008, 04:12 AM Go to last post
  5. Community Attitudes Towards Mentally Ill (Taylor & Dear,1981)

    Was wondering if anyone could be assistance to me, i'm using this CAMI likert scale, its a 40 item questionnaire based on a 5 response likert scale -...

    Started by kavanagh30‎, 10-08-2009 01:15 PM
    • Replies: 1
    • Views: 8,215
    08-04-2013, 11:33 AM Go to last post
  6. Not sure what test to use in SPSS?

    i have 4 IVs (wealth, health, social connectedness and love) and 1 DV but theyre all in numberical format. Does anyone know how to measure...

    Started by Elvenmunky‎, 04-24-2009 01:55 AM
    • Replies: 11
    • Views: 8,210
    04-27-2009, 05:32 AM Go to last post
  7. comparing different sample sizes

    I need to carry out an independent samples t-test, but the samples are of different sizes (12 & 14), do I need to carry out a non parametric...

    Started by lou_be‎, 03-02-2009 12:45 PM
    • Replies: 2
    • Views: 8,206
    03-02-2009, 03:46 PM Go to last post
  8. 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
  9. Explanatory Variable

    Ok, here is the question. A swimsuit manufacturer wants to test the speed of its newly designed suit. They design an experiment by having 6...

    Started by dietcoke2010‎, 10-11-2010 12:56 PM
    • Replies: 1
    • Views: 8,197
    10-11-2010, 01:36 PM Go to last post
  10. width of 90% CI and 95% CI

    Why is the width of the 90% CI different than that for the 95% confidence interval? My work: The width of the 90% CI differs than that of the 95%...

    Started by rgentil32‎, 03-17-2006 05:26 PM
    • Replies: 1
    • Views: 8,180
    03-17-2006, 06:11 PM Go to last post
  11. Help!! Need advice on calculating percentiles

    Hi - Hoping I can get some opinions on the method we are using to calculate percentiles. I work with a small non-profit - I need to calculate...

    Started by jhall251‎, 04-25-2007 10:16 AM
    • Replies: 2
    • Views: 8,177
    04-26-2007, 02:20 PM Go to last post
  12. Beta random variable to Normal random variable

    I want to transform a Beta distributed random variable to a normaly distributed random variable. Is there any way of doing that? Formally, ...

    Started by bs0409‎, 09-07-2009 07:28 AM
    • Replies: 3
    • Views: 8,177
    09-22-2009, 01:25 PM Go to last post
  13. t-test or mann-whitney

    I have 2 sets of data. Hospital stay duration (days) for a particular illness. Hospital 1: 21, 10, 32, 60, 8, 44, 29, 5, 13, 26, 33 Hospital 2:...

    Started by nigellscott‎, 07-09-2012 03:03 PM
    • Replies: 12
    • Views: 8,177
    07-09-2012, 07:52 PM Go to last post
  14. Question box plots - stem & leaf

    Hi, I was wondering when it comes to reporting results and you put in stem & leaf diagrams what it is exactly you report? I know some boxes have...

    Started by ktmrphy‎, 03-02-2010 09:35 AM
    • Replies: 2
    • Views: 8,175
    03-02-2010, 12:56 PM Go to last post
  15. How to scale the Gamma distribution when its probability is more than 1?

    Let us assume we have a gamma distribution with parameters alpha (or theta) = 1.33, beta (or k) = 0.0124 Some values of this gamma...

    Started by franziss‎, 12-29-2009 11:15 AM
    • Replies: 9
    • Views: 8,173
    01-01-2010, 10:33 PM Go to last post
  16. Maximum Likelihood Estimator for alpha in Gamma Distribution

    I got the first part of the question asking for the MLE for Beta. But I realized that MLE for alpha cannot be mathematically derived. I know that we...

    Started by yhalwani‎, 02-10-2012 01:38 AM
    • Replies: 11
    • Views: 8,169
    02-10-2012, 02:17 AM Go to last post
  17. Mann-whitney U test: All values are tied values - Is that ok?

    The following link provides great help for analysing agreement between two groups (say male & female) on a statement ranked on Likerts 5 point scale...

    Started by mantrak88‎, 02-09-2012 11:17 PM
    • Replies: 4
    • Views: 8,163
    05-11-2012, 10:31 AM Go to last post
  18. multiple proportions from one sample- sig testing

    Greetings all, I have a question about analysing responses from a multiple choice question. A lot of what we do in our analysis is say which...

    Started by TonyW‎, 11-05-2010 02:50 PM
    • Replies: 5
    • Views: 8,160
    01-09-2017, 10:49 AM Go to last post
  19. Post Question on Multinomial Logistic Regression

    I developed a multinomial logistic model (using SPSS) with 5 independent variables and dependent variable has three categories. The model output...

    Started by harry.wills‎, 10-19-2007 11:28 AM
    • Replies: 5
    • Views: 8,158
    11-02-2007, 02:39 AM Go to last post
  20. class width/ lower/upper boundry?

    Hey all, I understand how to do class width (range/number of classes) However, how would you do this? Suppose we chose 16 classes with a class...

    Started by No1Reyez‎, 10-07-2009 12:24 AM
    • Replies: 1
    • Views: 8,158
    10-07-2009, 03:04 PM Go to last post
  21. ANOVA results and confidence intervals

    Hallo can someone help me with this problem, please? I have done a univariate 2 factor ANOVA with spss. The problem is that the 95% confidence...

    Started by sirhoppel‎, 09-11-2006 11:05 AM
    • Replies: 2
    • Views: 8,157
    09-11-2006, 08:53 PM Go to last post
  22. plz i need your help

    hi everybody.. this z my 1st week in the stat course, am studing in Dubai. & i have some difficulties in answering these Qs: 4.51 A company...

    Started by doomy‎, 03-16-2009 09:19 AM
    • Replies: 2
    • Views: 8,147
    03-23-2009, 03:18 PM Go to last post
  23. Confidence intervals and significance level

    Please help to solve this exercise: A sample of 250 items from lot A contains 10 defective items, and a sample of 300 items from lot B is found to...

    Started by smske‎, 12-10-2011 03:32 PM
    • Replies: 4
    • Views: 8,136
    12-10-2011, 03:57 PM Go to last post
  24. How to predict future scores based on past scores.

    Hi, First time poster. I would like to work out what a player's next score will be in fantasy football. Eg. LJ posts scores for the past 4...

    Started by h0psing‎, 08-24-2009 12:33 AM
    • Replies: 6
    • Views: 8,128
    08-26-2009, 06:44 AM Go to last post
  25. Normal Distribution of Birth Problem

    Hello everyone, I've encountered a question regarding the normal-distribution, on what is considered as usual or unusual. For every 100 births...

    Started by mysterdusk‎, 10-30-2010 12:11 AM
    • Replies: 3
    • Views: 8,111
    10-30-2010, 02:07 PM Go to last post
  26. Did i get these right, T/F questions

    T 2. The claim that "male and female students at Coastal Carolina University prefer different parking lots on campus" is an example of a chi-square...

    Started by Bicano‎, 12-09-2008 09:56 PM
    • Replies: 2
    • Views: 8,109
    12-09-2008, 11:10 PM Go to last post
  27. Two-way ANOVA with or without replication?

    The logistics department of a large firm employs three “estimators” whose job it is to decide the likely cost of delivering their products to their...

    Started by amahesh2012‎, 04-29-2011 02:02 PM
    • Replies: 0
    • Views: 8,101
    04-29-2011, 02:02 PM Go to last post
  28. Aagh!! - % values - parametric or non parametric?

    Hi good people I am a very confused PhD student, and despite my best efforts over the past 24 hours have been unable to get a definitive answer to...

    Started by smurf80‎, 07-22-2008 01:35 PM
    • Replies: 1
    • Views: 8,093
    07-24-2008, 10:43 PM Go to last post
  29. non-central chi-square distribution

    Dear All I do not have enough background in statistics. Can any one please tell me how to finde probabality for noncentrally chi-sqaure random...

    Started by Abid‎, 11-14-2007 07:32 AM
    • Replies: 3
    • Views: 8,092
    11-15-2007, 09:34 AM Go to last post
  30. Intercept in Regression

    Hello, SHould we always include an intercept in regression analysis? What do we do if the intercept appears to be non significant? DO we take...

    Started by zarasandreas‎, 01-09-2010 04:43 AM
    • Replies: 1
    • Views: 8,089
    01-09-2010, 03:29 PM Go to last post
  31. equation for critical values of q

    Hello, I am looking for the equation(s) in how to calculate critical values of q. As you know q is used in doing Turkey's multiple comparison. I...

    Started by Adam00‎, 10-24-2010 06:36 PM
    • Replies: 1
    • Views: 8,089
    10-24-2010, 07:52 PM Go to last post
  32. Outliers and 5% trimmed means vs true mean

    Hi, I have a few categorical (likert scale) variables that each have 1 univariate outlier (z-score > 2.88 two tailed). I am considering recoding...

    Started by Alice‎, 02-26-2012 07:24 PM
    • Replies: 6
    • Views: 8,085
    02-26-2012, 09:39 PM Go to last post
  33. Pearson Critical Values

    I am working on a project where I need to determine trends in maintenance conducted on large ships. I have man-day totals and the age of the ship...

    Started by MrGibbage‎, 03-18-2010 04:01 PM
    • Replies: 4
    • Views: 8,081
    04-02-2010, 10:53 AM Go to last post
  34. How can I find out, if subscales are independent?

    I need to find out, if four subscales of a scale a independent from each other in my sample. A correlation with all four is a good start, so I did...

    Started by LtStarbuck‎, 04-14-2015 08:40 AM
    2 Pages
    1 2
    • Replies: 26
    • Views: 8,078
    05-06-2015, 10:44 AM Go to last post
  35. Arima

    Hi anyone knows how to calculate ARIMA using excel and also tell where i can find an example jay

    Started by jayaramg‎, 10-03-2009 07:20 PM
    • Replies: 1
    • Views: 8,074
    10-04-2009, 09:39 AM Go to last post
  36. Comparing Slopes Best Fit Lines Between 2 Groups

    So lets say I have 2 data sets. Both sets contain various types of information about a person, including age as well as other factors relating to...

    Started by fakbik‎, 06-18-2012 11:34 AM
    best fit, bivariate, correlation, scatter plot, slope
    • Replies: 6
    • Views: 8,068
    07-09-2012, 11:41 AM Go to last post
  37. The importance of calculus and matrix/linear algebra in understanding statistics

    Hey all, I'm currently in a stats class that teaches the course (right now with a focus on correlation and linear regression) in a very...

    Started by Rhodo‎, 02-07-2012 09:35 PM
    • Replies: 9
    • Views: 8,066
    02-08-2012, 12:03 AM Go to last post
  38. Red face what is the purpose in plotting moving average??

    please help.

    Started by ionc‎, 10-05-2006 04:33 PM
    • Replies: 1
    • Views: 8,061
    10-05-2006, 05:25 PM Go to last post
  39. Unhappy Need to calculate percentile score

    I need help from one of you guru's. I have 8 statements that i ask, that are to be rated from 1 to 5 each. so, the lowest score is 8 and the highest...

    Started by Freud52‎, 03-04-2008 12:19 PM
    • Replies: 11
    • Views: 8,059
    03-04-2008, 04:39 PM Go to last post
  40. The Central Limit Theorem

    Here is the question Weights of 15-year old males The mean weight of 15 year old males is 142 lbs, and the standard deviation is 12.3 lbs. If the...

    Started by Kosar‎, 11-15-2009 02:10 PM
    • Replies: 2
    • Views: 8,055
    11-16-2009, 12:36 PM Go to last post
  41. Properties of Summation and Expected Value question

    Hello, I'm doing an intro to econometrics course but we weren't taught properties of variances, expected values, and sigma notation and I'm getting...

    Started by toastintheshell‎, 08-03-2013 11:26 AM
    • Replies: 2
    • Views: 8,050
    08-03-2013, 12:30 PM Go to last post
  42. Sample Size Calculation for Clinical Study with Three Treatment Groups

    Hi, I was wondering if anyone knew a formula to calculate the sample size needed for a clinical study in which there are three groups (tx1, tx2,...

    Started by ceperras‎, 09-20-2008 06:12 PM
    • Replies: 3
    • Views: 8,048
    09-21-2008, 01:35 PM Go to last post
  43. Help!

    I have this problem and I am totally stuck. I know that I know how to do it, but I've just hit the proverbial wall. Any help would be greatly...

    Started by rirell‎, 09-24-2009 11:33 PM
    • Replies: 1
    • Views: 8,041
    09-25-2009, 03:23 AM Go to last post
  44. What's between ANOVA and linear model

    Hi everybody, I'm new around here, so if i do some mistakes regarding the threads etc. not to mention the statisitcal terms, sorry : ) I have a...

    Started by doctor‎, 10-12-2008 12:44 PM
    • Replies: 11
    • Views: 8,040
    10-15-2008, 07:30 PM Go to last post
  45. Need help with chi-squared analysis of observed vs expected percentages

    I'd appreciate any help possible with this as I am coming up against an abstract deadline and cannot get a hold of a statistician at my institution. ...

    Started by Ponder This‎, 11-30-2008 04:59 PM
    • Replies: 1
    • Views: 8,040
    11-30-2008, 09:35 PM Go to last post
  46. Analysis of Likert Scale data

    Hi All, I am doing research on expertise and had respondents use 7 point likert scales to provide answers to practical questions. I'm going to...

    Started by Servellen‎, 04-03-2011 07:59 AM
    • Replies: 0
    • Views: 8,040
    04-03-2011, 07:59 AM Go to last post
  47. Help

    I'm having a little trouble with the following question: Four pairs of data yield r = 0.942 and the regression equation (predicated value of y...

    Started by 1NAMILL‎, 11-18-2005 09:42 PM
    • Replies: 6
    • Views: 8,030
    11-19-2005, 10:10 PM Go to last post
  48. Pre/Post Data

    Hello. I have pre/post data that I would like advice on what would be the most appropriate data analysis method. I visited a group of clinics and...

    Started by kique‎, 02-24-2006 04:35 PM
    • Replies: 1
    • Views: 8,029
    02-24-2006, 05:33 PM Go to last post
  49. Grade Cut offs using a Curve

    I am currently taking my last math class for my degree and I'm on my last problem of our homework assignment. So far I have a 100%, but I'm...

    Started by powers4god‎, 07-21-2010 10:09 AM
    • Replies: 2
    • Views: 8,026
    07-22-2010, 09:56 AM Go to last post
  50. one mean t test---the p value approach

    I dont quite understand how to find the p value of other hypothesis tests including the one mean t test. Depending on the tails, are there...

    Started by l0v3n‎, 06-13-2008 01:14 PM
    • Replies: 2
    • Views: 8,025
    06-13-2008, 10:12 PM Go to last post
  51. Sample size for a pilot study

    I am looking for advice on what size a sample should be for a pilot study. The purpose of the pilot is to test a questionnaire. The population it...

    Started by grandmal‎, 05-27-2010 03:09 AM
    • Replies: 2
    • Views: 8,025
    05-27-2010, 11:14 AM Go to last post
  52. Repeated Measures for Ordinal and Dichotomous Data

    Hi, I have a dataset with some ordinal variables (likert) and some dichotomous variables (yes/no). Variables were collected from subjects at 5...

    Started by ceperras‎, 01-02-2009 04:20 PM
    • Replies: 1
    • Views: 8,024
    01-02-2009, 05:19 PM Go to last post
  53. Arrow Confidence Interval for Population Mean

    I am working on a statistics problem and want to make sure I am on the right track. Here is the problem: The following sample of 16 measurements...

    Started by 3sacharm‎, 11-13-2010 10:07 AM
    • Replies: 6
    • Views: 8,022
    11-13-2010, 11:51 AM Go to last post
  54. ANOVA post-hoc analysis in R

    Hi everybody, I have already analyzed my dataset using two-way ANOVA in R. The result is that both variables have a significant influence, but no...

    Started by moartl‎, 08-17-2009 12:58 PM
    • Replies: 1
    • Views: 8,019
    08-18-2009, 07:59 AM Go to last post
  55. Red face HELP! Question about frequency distribution

    I can't figure out how to make a frequuency distribution "using 5 classes" that would allow me to see the shape of the distribution. I would really...

    Started by ldwell‎, 09-08-2008 05:57 PM
    • Replies: 2
    • Views: 8,017
    09-09-2008, 06:32 AM Go to last post
  56. Comparing different units of measurement

    Hiya, Im wondering if anyone has any views on how to compare change in variables that are measured in different units? I cant normalise the data...

    Started by statto‎, 06-30-2008 04:54 AM
    • Replies: 2
    • Views: 8,001
    06-30-2008, 05:28 PM Go to last post
  57. How to compare the mean age between 2 groups?

    Supposed that I have 2 groups of students. N=10 for each group. Group A ages: 12, 13, 12, 13, 14, 14, 15, 12, 11, 13 --> mean age: 12.9 Group B...

    Started by vivian88‎, 04-17-2013 01:57 AM
    • Replies: 5
    • Views: 7,988
    04-19-2013, 07:37 AM Go to last post
  58. Correlations btw. Ordinal and Binary

    Anyone know what test to run to find a correlation between a 6-point ordinal variable and a binary one? What about between two binary ones? Any...

    Started by witheye‎, 08-05-2008 11:14 PM
    • Replies: 4
    • Views: 7,986
    08-11-2008, 10:03 AM Go to last post
  59. How to calculate a 'pooled SEM' for an ANOVA?

    I'm not quite sure I understand this conceptually. I have seen in a few biomedical articles now something referred to as a 'pooled SEM' from an...

    Started by Silvanus‎, 05-25-2009 10:07 AM
    • Replies: 2
    • Views: 7,985
    06-05-2009, 04:22 AM Go to last post
  60. Games-Howell tests in R

    Hiya, I have a set of data with one IV (3 levels) and 1 DV which fail a Bartlett's test for homogeneity of variance and the data cannot be...

    Started by hrj21‎, 06-18-2012 07:06 AM
    • Replies: 1
    • Views: 7,973
    06-19-2012, 11:03 AM Go to last post

+ Post New Thread

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