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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: 197,273
    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: 67,035
    09-30-2005, 09:44 AM Go to last post
  1. Analysing percentages

    Hi, I'm a newbie to this forum and am not very statistically minded. I've been trying to work out what way to best analyse the data I will be...

    Started by phial004‎, 03-11-2009 05:56 AM
    • Replies: 1
    • Views: 2,854
    03-11-2009, 05:04 PM Go to last post
  2. Hypothesis Inquiry

    I posted this under Discussion, but don't believe it should have gone there so I re-posted here....

    Started by TEE323‎, 06-03-2009 12:03 PM
    • Replies: 2
    • Views: 2,854
    06-04-2009, 10:37 AM Go to last post
  3. Comparing means of two different excel datasets using SAS (how to merge?)

    I have two different datasets. Need to compare dose in dataset1 to dose in dataset2 to find out if the difference is statistically significant. Both...

    Started by StatsClue‎, 02-11-2012 11:06 PM
    • Replies: 5
    • Views: 2,854
    02-12-2012, 02:12 PM Go to last post
  4. 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: 2,854
    05-06-2013, 01:32 PM Go to last post
  5. Question ANOVA help - comparing growth rates between groups with 3 replicates in each group

    Hi I'm really pretty lost, statistics have never been my strong point. I need to test whether my growth rate differences between trees are...

    Started by J@cki3‎, 09-30-2014 06:23 AM
    anova, excel, growth rate, replicates
    • Replies: 1
    • Views: 2,854
    09-30-2014, 01:50 PM Go to last post
  6. Urgent help on simple problem!!

    I don't know why, but I can't seem to get any suggestion on a solution to my simple problem when I search the web or look in my statistics books I...

    Started by Petter‎, 04-20-2007 08:09 AM
    • Replies: 2
    • Views: 2,853
    04-23-2007, 01:11 PM Go to last post
  7. big difference between sample sizes

    I want to check if the making of calls is depending of several variables (e.g. number of individuals present, number of females, number of males)......

    Started by janse030‎, 10-09-2008 07:33 AM
    • Replies: 1
    • Views: 2,853
    10-18-2008, 07:39 AM Go to last post
  8. Meaning of this integral

    What is the physical or statistical meaning of the following integral \int^{a}_{o} g(\vartheta) d(\vartheta) = \int^{\infty}_{a} g(\vartheta)...

    Started by jam_27‎, 03-08-2009 04:55 AM
    • Replies: 0
    • Views: 2,853
    03-08-2009, 04:55 AM Go to last post
  9. ANCOVA question

    Hi All ... Why is it that the corrected model in an ANCOVA has a different value than the DP for an ANOVA? (I just know that sounds stupid). ...

    Started by Philyuko‎, 07-19-2011 02:53 PM
    • Replies: 6
    • Views: 2,853
    07-20-2011, 12:27 PM Go to last post
  10. Solve for SD

    Can you calculate SD given the following? If not what is all needed? Group 1 N: 48 M: 29.60 SE: 1.16 SD: ?? Group 2 N: 49

    Started by ENAZ‎, 02-04-2012 07:57 PM
    • Replies: 6
    • Views: 2,853
    02-04-2012, 10:35 PM Go to last post
  11. Find Outliers in Transaction Data

    Hi folks, I'm looking for your opinions on the best way to solve a need I have for finding outliers in a set of data. A while ago I wrote a...

    Started by DVC‎, 09-11-2012 02:23 PM
    • Replies: 0
    • Views: 2,853
    09-11-2012, 02:23 PM Go to last post
  12. 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: 2,852
    10-14-2008, 01:54 PM Go to last post
  13. How to use a Distance Matrix as an Independent Variable?

    Hello, Let's say I have 100 locations. I know the distance between each location (i.e. distance matrix). How can I use the distance matrix (or...

    Started by nofunsally‎, 05-18-2011 01:47 PM
    distance, matrices, matrix, response
    • Replies: 9
    • Views: 2,852
    05-19-2011, 08:32 PM Go to last post
  14. skew and kurtosis on questionnaire

    I am running a factor analysis on data collected for a Likert scale questionnaire (200 participants) and have found that SPSS shows that a majority...

    Started by op2222‎, 02-17-2014 11:06 AM
    • Replies: 1
    • Views: 2,852
    02-17-2014, 11:36 AM Go to last post
  15. Time series

    I have a poverty dataset and I wish to forecast the poverty percentage of a place in the future. I only have 2 years = 2006 and 2012 data. Is time...

    Started by auroraborealis‎, 12-12-2016 08:01 AM
    time series
    • Replies: 3
    • Views: 2,852
    12-12-2016, 11:45 PM Go to last post
  16. Ancova

    Hey, I'm using a two-way ANCOVA for my statistics assignment, but I don't know how to determine whether its a 2x2 or 3x2 ANCOVA (there are two...

    Started by pyramid1‎, 09-27-2009 10:43 AM
    • Replies: 2
    • Views: 2,851
    09-27-2009, 11:51 AM Go to last post
  17. rejection region and p-value help

    deleted .

    Started by sintral‎, 10-13-2009 06:51 PM
    • Replies: 0
    • Views: 2,851
    10-13-2009, 06:51 PM Go to last post
  18. Help! ANOA and parameter estimates

    Hi I'm new to statistics, but have to take an advanced quant module as part of my research training. We've been set a research task to see...

    Started by hannahathomeinyork‎, 03-19-2010 08:03 AM
    • Replies: 0
    • Views: 2,851
    03-19-2010, 08:03 AM Go to last post
  19. Central areas

    I'm so stuck on this question, its really starting to do my head in. I've listened to my recorded lectures on this topic about 8 times and gone over...

    Started by placid‎, 09-10-2010 07:15 PM
    • Replies: 11
    • Views: 2,851
    09-10-2010, 09:27 PM Go to last post
  20. Regression coefficient for reference groups -- yay or nay?

    Hi all, When I'm working on a variable with 5 different categories and one is the reference group in a logistic regression, I only have 4...

    Started by smashing‎, 12-01-2016 07:50 PM
    • Replies: 5
    • Views: 2,851
    12-01-2016, 10:01 PM Go to last post
  21. Geometric standard deviation

    Hi, Can someone help? I'm trying to find a method to calculate geometric standard deviation. I thought you just took the natural log of your values...

    Started by AnnaH‎, 03-26-2008 03:48 AM
    • Replies: 0
    • Views: 2,850
    03-26-2008, 03:48 AM Go to last post
  22. Mauchly's Test of Sphericity

    Hello I ran a repeated measures ANCOVA. However, Mauchly's Sphericity statistic was not defined as I had <2 levels. Thus, do I need to look at my...

    Started by Salina‎, 09-07-2011 02:41 PM
    • Replies: 0
    • Views: 2,850
    09-07-2011, 02:41 PM Go to last post
  23. Help Please Single Item Likert

    Hi I have given 5 single item statements for folk to reply to such as: 1. I have faith in my country's politicians 2. I believe mionority groups...

    Started by rlynas‎, 09-29-2007 08:47 AM
    • Replies: 1
    • Views: 2,849
    09-30-2007, 02:59 PM Go to last post
  24. Cool Waht is the relationship between Q-value and t-values

    I am just learning ANOVA, and i found that in the Tukey's procedure, Q-value is introduced(studentized range distribution). however when it refers to...

    Started by humanmaycry‎, 05-19-2008 04:33 PM
    • Replies: 0
    • Views: 2,849
    05-19-2008, 04:33 PM Go to last post
  25. Question Problem with Meta-Analysis/Solution: Non-Parametric Test?

    Hi everybody, I have the following problem/question: I researched the results of 10 independent surveys conducted in 3 different countries. All...

    Started by Leosw1981‎, 03-19-2010 08:09 AM
    • Replies: 0
    • Views: 2,849
    03-19-2010, 08:09 AM Go to last post
  26. T Test using stata

    hello, i am trying to compare means for different variables by different year groups, i was wondering whether the data i have used for the TTest has...

    Started by kristofD5‎, 03-19-2011 06:49 PM
    • Replies: 0
    • Views: 2,849
    03-19-2011, 06:49 PM Go to last post
  27. latent class

    For a market research study I am using latent class. I want to find out what kind of things are important to different people. I will use regression....

    Started by ivoeman‎, 11-01-2006 01:22 PM
    • Replies: 1
    • Views: 2,848
    11-01-2006, 01:44 PM Go to last post
  28. Probit Model Question

    I often work with time-series models and this is my first attempt at a probit model. I am working on a probit model for leveraged buy-out (LBO)...

    Started by mportnoy‎, 07-02-2007 10:42 AM
    • Replies: 0
    • Views: 2,848
    07-02-2007, 10:42 AM Go to last post
  29. Drunk Random Walk Stats HW

    (c) A drunk performs a "random walk" over position 0;§1;§2;§3; : : : as follows: He starts at 0. He takes successive one-unit steps, going to the...

    Started by cyberstat‎, 12-13-2008 11:57 PM
    • Replies: 0
    • Views: 2,848
    12-13-2008, 11:57 PM Go to last post
  30. Change in monthly values at the annual time step

    Greetings: I have 56 years of monthly hydroclimatological data. I have used the TREND toolkit ( http://toolkit.ewater.com.au/trend ) to examine...

    Started by KevinSpelts‎, 01-28-2010 09:45 AM
    • Replies: 1
    • Views: 2,848
    02-01-2010, 10:17 AM Go to last post
  31. Wink ***Fun Challenge -- weighted average of global rankings***

    Goal The goal is to create a weighted average of global rankings. Does not have to be perfectly accurate (if that was even possible). Specific...

    Started by rm2dance‎, 07-21-2011 11:26 PM
    • Replies: 2
    • Views: 2,848
    08-03-2011, 11:36 AM Go to last post
  32. Determining influence on test score

    Hello, I'm trying to determine how some tasks (nominal, ordinal) on one test influence the total score of the test (ratio). As I searched, linear...

    Started by krojc‎, 08-01-2011 01:31 AM
    • Replies: 10
    • Views: 2,848
    08-01-2011, 10:08 AM Go to last post
  33. How to report dummy variables (logistic regression, SPSS)

    I am trying to write up a logistic regression analysis into a table, but am confused with what to report. I have a categorical variable which has 3...

    Started by bakere‎, 12-20-2012 01:52 PM
    • Replies: 0
    • Views: 2,848
    12-20-2012, 01:52 PM Go to last post
  34. Factorization Theorem for Sufficient Statistic

    Hi, I am working through a problem using the Fisher–Neyman factorization theorem. Show that \prod_{i=1}^{n}X_i and \sum_{i=1}^{n}X_i are...

    Started by S-C-3-1-3‎, 03-07-2013 12:50 AM
    • Replies: 6
    • Views: 2,848
    03-07-2013, 01:21 AM Go to last post
  35. test for trend across groups

    Dear forum, I would be grateful for some help with a simple problem. I have some data arranged in 5 groups. Each group contains a single data...

    Started by tonytheviking‎, 06-11-2013 06:40 AM
    • Replies: 3
    • Views: 2,848
    06-11-2013, 12:53 PM Go to last post
  36. Outliers and correlation

    Hi all Im working on small size sample (17) . and need to do correlation for alot of prameters my questions is : -is removing the outliers is...

    Started by lora‎, 08-01-2013 12:05 PM
    correlatiomn, outliers
    • Replies: 8
    • Views: 2,848
    08-02-2013, 06:08 AM Go to last post
  37. Ordinal Data!

    Hi, I am looking for some guidance on what tests to use on some ordinal data I need to analyse. I have exam results of pupils (graded A, B, C, D,...

    Started by timric‎, 08-27-2008 10:35 PM
    • Replies: 3
    • Views: 2,847
    08-28-2008, 05:27 AM Go to last post
  38. Unhappy Help with really f***ed up factorial ANOVA needed

    Hi I really hope someone can help me with this. The central analysis of the study i am working on is a factorial ANOVA (1 between subjects...

    Started by quaelgeist‎, 07-26-2010 01:59 PM
    • Replies: 3
    • Views: 2,847
    07-28-2010, 05:09 AM Go to last post
  39. Design of Experiments Question

    I have a question about a design of experiments problem. I am being asked to analyze the relationship between max stress of an object and how it...

    Started by DOENewbie‎, 06-07-2008 03:10 PM
    • Replies: 4
    • Views: 2,846
    06-08-2008, 02:13 PM Go to last post
  40. Unhappy please help an exhausted and stressed student!

    I would be so eternally greatful if somebody could please help me! I am doing my dissertation and have come to analysing my data using SPSS, and i am...

    Started by psycstudent‎, 02-09-2010 05:33 AM
    • Replies: 8
    • Views: 2,846
    02-09-2010, 06:04 PM Go to last post
  41. Novice seeking advice.

    Hello I've produced a spreadsheet with the intention of forecasting the odds for soccer games in the Home,draw,away market (1X2). I produce...

    Started by Andy_Lucian‎, 06-15-2010 05:05 AM
    • Replies: 2
    • Views: 2,846
    06-15-2010, 08:40 AM Go to last post
  42. Smile Suppose that the first four numbers that where chosen are (3,4,10,11). What is the

    the last number you should choose so that the mean is 7 and the median is 10? A. 5 B. 6 C. 7 D. 8 E. 9 F. 10 G. It is impossible to choose...

    Started by tomkkk‎, 01-12-2012 02:12 AM
    • Replies: 1
    • Views: 2,846
    01-12-2012, 02:37 AM Go to last post
  43. Permutational multivariate analysis of variance using distance dissimilarities

    Hi, I'm wondering how can I perform a repeated measures permutational multivariate analysis of variance in Adonis (R)? Cheers.

    Started by Baldissera‎, 03-27-2012 10:21 AM
    • Replies: 0
    • Views: 2,846
    03-27-2012, 10:21 AM Go to last post
  44. statistics

    I need help with this question please The Academy Awards for the Best Actress and Best Actor have been given every year since 1928. The ages of...

    Started by mlg‎, 10-03-2014 05:16 PM
    • Replies: 3
    • Views: 2,846
    10-03-2014, 07:56 PM Go to last post
  45. Implications of eliminating the middle option of a 5-point Likert

    Hi all, Assuming I have data from a multi-item questionnaire, 5-point Likert. Raw scores have been converted into STEN and tabulated into norms....

    Started by kpoon1708‎, 02-25-2008 02:41 AM
    • Replies: 3
    • Views: 2,845
    02-27-2008, 04:32 AM Go to last post
  46. Goodness of fit indices for comfirmatory factor analysis

    I have carried out an exploratory and then a confirmatory factor analysis on a dataset. I need to report a Bentler's Comparative Fit Index (CFI) and...

    Started by littlewelshgirl‎, 02-26-2009 11:29 AM
    • Replies: 0
    • Views: 2,845
    02-26-2009, 11:29 AM Go to last post
  47. Dependent Data?

    I hope this is the appropriate forum for this: I would be very grateful if anyone were able to advise on this; my background in statistics is...

    Started by jrb43‎, 07-22-2009 09:49 AM
    • Replies: 2
    • Views: 2,845
    07-31-2009, 06:52 PM Go to last post
  48. open output

    is there a way i could open my spss tables with word?or excel? I dont have the software at home and I need the tables to do my assignment.

    Started by Boa‎, 05-31-2010 05:38 PM
    • Replies: 2
    • Views: 2,845
    05-31-2010, 08:33 PM Go to last post
  49. Correlation, am I right ?

    Hi Guys, I saw the next question in an exam, and I think it's wrong (the question). The attached graph is showing the change in the rates of 2...

    Started by WeeG‎, 12-22-2010 07:14 AM
    • Replies: 2
    • Views: 2,845
    12-22-2010, 08:15 PM Go to last post
  50. Exclamation help with my statistics project!

    Hi TalkStats! So im in AP Statistics for my senior year class and needless to say senioritis got a little too bad! I fell behind a bit in...

    Started by bodylanguage‎, 06-02-2011 08:43 PM
    • Replies: 1
    • Views: 2,845
    06-03-2011, 11:39 AM Go to last post
  51. Q re Kappa statistic

    I am trying to calculate inter-rater reliability scores for 10 survey questions-- most of which are binary (yes/no). The agreemeant level bettwen the...

    Started by jturk‎, 06-27-2011 12:20 PM
    binary, inter-rater reliability, kappa, likert
    • Replies: 2
    • Views: 2,845
    06-27-2011, 01:58 PM Go to last post
  52. Exponential Distribution Help Needed

    Hello all. I am having trouble with the exponential distribution in general, but specifically on the following problems: 4.2.2) Suppose that you are...

    Started by torchflame‎, 03-08-2013 12:54 PM
    • Replies: 2
    • Views: 2,845
    03-08-2013, 02:15 PM Go to last post
  53. Probability question- Help Im stuck

    Question: A group of 100 people exhibited the following blood types: A20 B24 AB10 O46 If one person is selected at random, what is the probability...

    Started by sweetx‎, 11-19-2008 11:18 PM
    • Replies: 1
    • Views: 2,844
    11-20-2008, 07:50 AM Go to last post
  54. What sort of data is this? In a pickle

    Hi, sorry first of all if is could be suited more towards a different catagory. Basically ive done questionaire and one question is : 3....

    Started by 98107‎, 11-10-2011 02:40 PM
    climate, likert, ordinal, test
    • Replies: 13
    • Views: 2,844
    11-10-2011, 06:50 PM Go to last post
  55. Which stats test to use

    Hello :) I am really rubbish at stats, so now in my 3rd year project I am totally lost. I was told I need to do multiple regression in SPSS,...

    Started by hello_kitty‎, 02-20-2011 03:42 PM
    • Replies: 1
    • Views: 2,843
    02-21-2011, 04:10 AM Go to last post
  56. SEM: Latent variable variance

    Hello everyone, it would be great if you could confirm whether I understood this or not. I'm having trouble applying SEM results to an agent-based...

    Started by mueslihippie‎, 03-29-2012 04:42 AM
    • Replies: 0
    • Views: 2,843
    03-29-2012, 04:42 AM Go to last post
  57. Question A manual example of Moran's Local I (Outlier)

    Dear forum, a question about spatial statistics: I am trying to uderstand exactly how the Local Moran's I equation works, the equation can be...

    Started by garynobles‎, 10-23-2013 07:54 AM
    • Replies: 0
    • Views: 2,843
    10-23-2013, 07:54 AM Go to last post
  58. There are no valid cases for VAR when GRP = .. Statistics cannot be computed for this

    When I perform a normality test for my variables using the grouping variable named "Group", I got a warning message telling me that there are values...

    Started by tonia bird‎, 11-01-2014 07:47 AM
    warning message
    • Replies: 4
    • Views: 2,843
    11-01-2014, 04:00 PM Go to last post
  59. Simple effects to understand interaction between repeated variables in mixed ANOVA

    Hi there, I am having problems with the statistical analysis for a linguistics paper I am writing. So this study is a mixed ANOVA design with 3...

    Started by yinsstats‎, 01-09-2017 06:45 AM
    mixed design anova, simple effects
    • Replies: 0
    • Views: 2,843
    01-09-2017, 06:45 AM Go to last post
  60. Please help with a midterm review question

    Hi everyone, i hope you can help me try to make sense of this midterm review sheet. Data given with x("x-bar"), ("y-bar"), sx, sy and r. Sketch...

    Started by perplehaze‎, 10-23-2008 07:02 PM
    • Replies: 3
    • Views: 2,842
    10-23-2008, 08:42 PM Go to last post

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