1. Announcement:
    Want access to a chatbox?
    Dason ‎(Devorador de queso)
+ Post New Thread
Page 64 of 294 FirstFirst ... 14 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 114 164 ... LastLast
Threads 3781 to 3840 of 17589

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: 196,934
    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: 66,847
    09-30-2005, 09:44 AM Go to last post
  1. forecast modeling, am I doing this right?

    Forgive me father, it's been many years since my last biostats class. This isn't HW, just a side project that I picked up an don't want to embarrass...

    Started by noobers‎, 04-30-2014 11:49 PM
    • Replies: 0
    • Views: 814
    04-30-2014, 11:49 PM Go to last post
  2. Intervention Analysis - multiple interventions

    I am familiar with using Box and Tiao intervention analysis for a single intervention, but I was wondering what statistical method to use for the...

    Started by Stat8‎, 04-30-2014 11:30 PM
    • Replies: 1
    • Views: 1,151
    04-30-2014, 11:34 PM Go to last post
  3. I don't understand the results of my ANOVA

    I have run general linear model (ANOVA) in SPSS to test whether habitat type (2 categories) and habitat disturbance (2 categories) have an effect on...

    Started by aelw‎, 04-30-2014 02:35 PM
    anova, biology, ecology
    • Replies: 1
    • Views: 1,066
    04-30-2014, 03:39 PM Go to last post
  4. Experimental Design/Need help reviewing my answers

    I am having difficulties with questions below. I know I have a couple of them wrong, but I am not sure which one. I keep going over and over trying...

    Started by viv_shc‎, 04-30-2014 03:30 PM
    experiment design, sampling design
    • Replies: 0
    • Views: 2,192
    04-30-2014, 03:30 PM Go to last post
  5. Copulas: How Archimedean copulas satisfy the general copula definition

    Supposing FI=generator function of an Archimedean copula. INVFI = inverse of this generator function FI(INVFI(u1), ..., INV(u(d))) is an...

    Started by Mary12345‎, 04-30-2014 01:20 PM
    archimedean, copula, generator
    • Replies: 0
    • Views: 895
    04-30-2014, 01:20 PM Go to last post
  6. CART produced by rpart() and tree()

    Dear All, I have a pretty hard time of interpreting the result generated by the commands rpart(). For example, below is my code of using the...

    Started by shijbian‎, 04-30-2014 06:19 AM
    cart, rpart, tree
    • Replies: 0
    • Views: 2,140
    04-30-2014, 06:19 AM Go to last post
  7. Normalize data

    Hi Folks, I have a set of data for which I need to normalize within the range of 0 to 1. I came across two formulas on web 1) Xi,0 to1 = (Xi -...

    Started by krishna_kranth‎, 04-29-2014 01:28 AM
    • Replies: 4
    • Views: 2,213
    04-30-2014, 05:37 AM Go to last post
  8. Assumptions in ANCOVA, and consequences of violating them

    I ran an ANOVA with 4 predictors (2 categorical, 2 continuous) and 1 covariate (continuous). Including the covariate did not significantly alter the...

    Started by MR92‎, 04-30-2014 03:59 AM
    ancova, anova, assumption, covariate, homogeneity of slopes
    • Replies: 0
    • Views: 1,171
    04-30-2014, 03:59 AM Go to last post
  9. First timer in need of homework help

    I have been trying everything I can think of to solve this. I know it is simple, using a binomial function to calculate the f(x), but no matter what...

    Started by Billboard‎, 04-29-2014 05:41 PM
    • Replies: 0
    • Views: 1,191
    04-29-2014, 05:41 PM Go to last post
  10. Simplifying Regression Model without Backshift Notation

    How do I rewrite "B^4Yt=c+et" without backshift notation and with Yt alone on one side of the equation? I have spent hours reading our book and...

    Started by LostAndConfused1‎, 04-29-2014 11:46 AM
    • Replies: 1
    • Views: 1,212
    04-29-2014, 12:15 PM Go to last post
  11. Seeking Stats/Maths Experts for Help Determining Possible Analysis of Complex Data

    Dear all, I have recently started a new job and have taken on a large and complex data set. I do not think meaningful analysis is possible, but I...

    Started by forensicstats‎, 04-28-2014 01:54 PM
    combinations, complex design, complex survey design, data analysis, help needed
    • Replies: 1
    • Views: 1,137
    04-29-2014, 08:44 AM Go to last post
  12. split plot design with more than one facor in whole plot

    I am trying to do a split plot design with 3 factors in whole plot and 1 factor in the split design and 4 replications. I am using CRD. My question...

    Started by hp29‎, 04-28-2014 09:33 PM
    • Replies: 4
    • Views: 1,168
    04-29-2014, 07:49 AM Go to last post
  13. Reverting independent and dependent variables.

    Hello everyone My hypothesis is that people with different values of A (nm the actual variable) show different level of B, beyond several...

    Started by Shachar‎, 04-29-2014 02:25 AM
    • Replies: 1
    • Views: 1,093
    04-29-2014, 07:49 AM Go to last post
  14. Prediciting accidents

    I have some data which measures the amount of hazard inspections completed in a workplace. I want to find whether there is a relationship between the...

    Started by TimA‎, 04-26-2014 05:33 PM
    2 Pages
    1 2
    • Replies: 22
    • Views: 3,535
    04-29-2014, 05:10 AM Go to last post
  15. PLEASE HELP...Response Model

    I am really struggling with this question...sorry but two of the equations did not copy over so I have attached the full version. You have...

    Started by Raidersfan‎, 04-24-2014 08:32 AM
    • Replies: 4
    • Views: 998
    04-28-2014, 11:54 AM Go to last post
  16. Forecasting or regression?

    Hello! I am currently writing a research paper on energy tax impact on individual sector production and I've got quite a problem with my...

    Started by Teaa‎, 04-28-2014 05:16 AM
    forecasting, regression
    • Replies: 1
    • Views: 1,267
    04-28-2014, 07:57 AM Go to last post
  17. Sample Question

    The weight of food packed in a certain container is normally distributed with a mean of 500 grams and a standard deviation of 5 grams. A random...

    Started by TacoMan‎, 04-27-2014 10:44 PM
    • Replies: 1
    • Views: 981
    04-28-2014, 04:27 AM Go to last post
  18. Using bootstrap to calculate the sample size for a median ?

    hi, I have a small(ish) sample of 31 data points from a highly right skewed distribution and need to determine the sample size to estimate the...

    Started by rogojel‎, 04-17-2014 05:11 AM
    bootstrap, sample size, skewed data
    • Replies: 8
    • Views: 2,356
    04-28-2014, 01:29 AM Go to last post
  19. How well two lines fit a statistical model

    Hi, Basically I have some data which I have put into a graph which shows two lines plotted against time. The two lines use separate Y axis...

    Started by Billywizz‎, 04-27-2014 09:38 PM
    • Replies: 0
    • Views: 961
    04-27-2014, 09:38 PM Go to last post
  20. Help with nonparametric methods please

    Hello! I would like to ask your recommendations as to what nonparametric method I should use. I am collecting data from four (stakeholder) user...

    Started by Karl_77‎, 04-27-2014 03:36 PM
    • Replies: 0
    • Views: 1,348
    04-27-2014, 03:36 PM Go to last post
  21. How do I prove my results are statistically significant or not?

    Sorry in advance, I'm a complete statistics novice! I have a three chemical samples which were prepared in exactly the same way, and when tested...

    Started by Soc‎, 04-25-2014 01:31 PM
    average, dissertation, p value, standard deviation
    • Replies: 9
    • Views: 1,637
    04-27-2014, 03:29 PM Go to last post
  22. Maximum Likelihood Estimator - What did I do wrong?

    For a X_1,,X_n random sample from a uniform distribution from , I was asked to find the MLE. The pdf: f(x|theta) = 1/(2*theta+1) for x in and 0...

    Started by revans.evans‎, 04-27-2014 12:06 PM
    mathematical statistics
    • Replies: 4
    • Views: 1,278
    04-27-2014, 12:29 PM Go to last post
  23. Likelihood Ratio test

    I have a pdf where I would like to test for the following hypothesis: H0: θ1=θ1,0; Ha: θ1>θ1,0, and f(x) =(1/θ1) exp((-x-θ2)/θ1), if x>θ2, and 0...

    Started by absama‎, 04-26-2014 07:18 PM
    hypothesis testing, likelihood ratio test
    • Replies: 8
    • Views: 1,858
    04-27-2014, 10:51 AM Go to last post
  24. Red face Problem of maximum likelihood estimation of time series

    Hi everyone, I have a problem of how to calculate the MLE for a given time series data set. I have read the book Statistical Method for...

    Started by rayy23‎, 04-27-2014 03:41 AM
    maximum likelihood, time series
    • Replies: 1
    • Views: 1,131
    04-27-2014, 07:23 AM Go to last post
  25. Is it possible to test if two means ( standard error) are significant different?

    Hi. I am a marine biologist meaning that I know a lot about fish and very little about statistical analysis. I have a problem I hope someone in here...

    Started by Rasmusern‎, 04-26-2014 03:04 PM
    • Replies: 1
    • Views: 3,863
    04-26-2014, 03:18 PM Go to last post
  26. Meta-Analysis: Transforming F scores to Cohen's d

    I need to convert F statistics from 1-Way & from 2-Way ANOVAs into Cohen's d. The formula in my handbook: d = (2 * the square root of F) /over/...

    Started by HMKz‎, 04-26-2014 01:10 PM
    cohen's d, conversion, f test, f-statistic, transformation
    • Replies: 1
    • Views: 1,181
    04-26-2014, 02:56 PM Go to last post
  27. Regression analyses and mediation with not normally distributed control variable HELP

    I am measuring the relationship between an IV and DV and whether two other variables mediated/predicted this relationship. All are normally...

    Started by Cd464‎, 04-26-2014 11:40 AM
    help!, normal distributed, regression analysis, regression assumption
    • Replies: 0
    • Views: 1,565
    04-26-2014, 11:40 AM Go to last post
  28. marginally significant p values

    Hello, I was wondering if someone could shed some light on what constitutes a marginally significant p-value? It doesn't seem to me that there are...

    Started by psychologygirl‎, 04-01-2009 03:31 PM
    • Replies: 2
    • Views: 23,821
    04-26-2014, 06:38 AM Go to last post
  29. Comparing two sets of data of different sizes - Chi-square test?

    Hi. I'm writing a proposal for a research project that is looking at the types of words people would like to target in therapy after a stroke. ...

    Started by Clare J‎, 04-26-2014 06:22 AM
    • Replies: 0
    • Views: 1,902
    04-26-2014, 06:22 AM Go to last post
  30. Z-test? Paired t-test? T-test two sample assuming equal variances?

    Hey guys! I'm hoping this is the correct forum to post this in. I'm working on my senior thesis, and it's been a while since I've taken stats so...

    Started by LDee‎, 04-25-2014 08:29 PM
    t-test, z-test
    • Replies: 0
    • Views: 1,715
    04-25-2014, 08:29 PM Go to last post
  31. Smile What is the correct test I should use. PLEASE HELP ME.

    Hi, I'm testing the effects background colour has on reading comprehension score. I will use 4 different colours. I'm also testing whether...

    Started by Thisgirlsname‎, 04-25-2014 06:27 PM
    • Replies: 1
    • Views: 1,882
    04-25-2014, 07:57 PM Go to last post
  32. [SOLVED] interpret sin and cos terms

    Im just looking for a reference that will help me understand how to interpret a cos and sin function in a model such as: ...

    Started by bugman‎, 04-16-2014 07:05 PM
    • Replies: 6
    • Views: 1,809
    04-25-2014, 04:56 PM Go to last post
  33. Critique my regression analysis interpretation

    Hi everyone, i am studying for an exam, and one of the main sections of this exam is to interpret data from a SPSS regression analysis. I have...

    Started by jarrelles‎, 04-25-2014 03:52 PM
    • Replies: 0
    • Views: 1,048
    04-25-2014, 03:52 PM Go to last post
  34. Question Which analysis is appropriate for our study design with multiple DV's at 3 levels?

    Our bachelor research is about distance perception in the peripersonal space. The experiment was already complex to design with the oculus rift, but...

    Started by Kyana‎, 04-24-2014 02:58 PM
    • Replies: 13
    • Views: 1,833
    04-25-2014, 03:45 PM Go to last post
  35. interpreting regression data

    Hi everyone, just a quick question, when your analysing regression data for multiple regressions, if an individual predictor/IV is not significant,...

    Started by jarrelles‎, 04-25-2014 01:37 PM
    • Replies: 3
    • Views: 1,384
    04-25-2014, 02:26 PM Go to last post
  36. Question Normal distribution

    Should the independent variables be normally distributed to run multiple linear regression in Stata?

    Started by mariamoskvina‎, 04-24-2014 05:03 AM
    • Replies: 14
    • Views: 2,800
    04-25-2014, 09:51 AM Go to last post
  37. What type of analysis is best ?

    To sum up I have a population of 36 respondents split into two groups High perfomers (18) and low performers (19). I would like to analyse the mean...

    Started by Morgan1991‎, 04-24-2014 06:54 PM
    • Replies: 4
    • Views: 1,391
    04-25-2014, 06:11 AM Go to last post
  38. Missing data-biostatistics

    Hello all! I am so needing help because I am so lost. I am getting my Master's of Public Health, and I am in my first Biostatistics class. I was just...

    Started by Susan1219‎, 04-25-2014 02:03 AM
    • Replies: 5
    • Views: 1,579
    04-25-2014, 02:44 AM Go to last post
  39. Chi Square

    2. A recent survey of 1,223 children, ranging in age between 8 and 12 years old, reported the following results. Suppose that the survey was based on...

    Started by Boston111‎, 04-24-2014 02:21 PM
    chi sq, chi sq test
    • Replies: 3
    • Views: 1,628
    04-25-2014, 02:04 AM Go to last post
  40. Testing Model Assumptions - Randomized Complete Block - Normality & Homogeneity Var

    F1 - 3 Levels; F2 - 2 Levels; Block - 3 Levels. I have a data set with one rep per Block and Treatment combinations of F1 & F2. An example is ...

    Started by simplemts‎, 04-24-2014 11:13 PM
    • Replies: 0
    • Views: 1,128
    04-24-2014, 11:13 PM Go to last post
  41. Help with mixed measures design

    Hi, I'm carrying out analysis on a mixed measures design. The within subjects factors are 2 (male/female) x 2 (high dependence/low dependence) x 3...

    Started by coppersulphate‎, 04-24-2014 04:46 PM
    • Replies: 0
    • Views: 1,484
    04-24-2014, 04:46 PM Go to last post
  42. Would it be possible to calculate the mean, median or SD for this data?

    Would it be possible to calculate the mean, median or SD for the following data? If so, what am i to look at? I just started a stats...

    Started by kathmustdie‎, 04-24-2014 03:22 PM
    • Replies: 1
    • Views: 1,568
    04-24-2014, 03:55 PM Go to last post
  43. the standard error of the sample? why divide through N?

    Hey guys i've recently been recapping some statistics and i got stuck trying to figure out why it is okay to use the standard deviation of a 'sample'...

    Started by waterman182‎, 04-24-2014 02:01 PM
    • Replies: 0
    • Views: 2,978
    04-24-2014, 02:01 PM Go to last post
  44. Help please! ranges

    I am in deep thesis deadline hell and would gretley apreciate any help witht he below matter. Basically i have set of ranges and single figuers...

    Started by Morgan1991‎, 04-24-2014 10:49 AM
    • Replies: 2
    • Views: 1,218
    04-24-2014, 11:27 AM Go to last post
  45. stuck

    I have my fixed cost 150000. I have 5 hairstylist who will work 1600hrs per a year. fixed price for my customer female 60$ and male 30$ in which 65%...

    Started by janice‎, 04-24-2014 01:42 AM
    • Replies: 2
    • Views: 1,088
    04-24-2014, 11:22 AM Go to last post
  46. Which ANOVA? ...very stuck!

    I have been looking for days now which ANOVA would be best but I am not sure which one I can use to analyse my data! Any help would be massively...

    Started by CONFUSEDstudent1991‎, 04-23-2014 10:30 AM
    anova, spss, stats
    • Replies: 7
    • Views: 1,341
    04-24-2014, 07:03 AM Go to last post
  47. posterior distribution conditioned on a second parameter

    If you have 2 parameters a and b and a observed data set x, and wish to calculate the posterior distribution of a given b is the following true ...

    Started by JJstar‎, 04-24-2014 05:36 AM
    bayesian, conditional, posterior
    • Replies: 0
    • Views: 817
    04-24-2014, 05:36 AM Go to last post
  48. Regression - Dummy time variable

    Hello, I am doing multiple regression with 4 time dummy variables for 5-years period. I'm getting the p-values for dummy variables > 0.05. How to...

    Started by john_f‎, 04-24-2014 04:02 AM
    • Replies: 0
    • Views: 1,262
    04-24-2014, 04:02 AM Go to last post
  49. Having a problem with confidence intervals

    Here is the data, each line is for a different soccer franchise: Revenue/Value(Millions) 459/1835 563/323 369/1181 513/1000 406/990 ...

    Started by Boston111‎, 04-23-2014 06:10 PM
    confidence interval
    • Replies: 3
    • Views: 1,408
    04-23-2014, 07:47 PM Go to last post
  50. Statement of significance

    Is saying that β1= β2=.= β11=0 (ie: through an F-test) equivalent to saying that "none of the coefficients are significant" (p>0.05 in the STATA...

    Started by ineedhelpineedhelp‎, 04-19-2014 12:07 PM
    • Replies: 10
    • Views: 2,273
    04-23-2014, 01:39 PM Go to last post
  51. goodness of fit test for bivariate analysis?

    I'm hearing differing opinions on the use of overall tests for bivariate analyses. Does it make sense to do a chi-square test or similar for a simple...

    Started by pepsketch‎, 04-23-2014 11:59 AM
    • Replies: 0
    • Views: 1,397
    04-23-2014, 11:59 AM Go to last post
  52. Justify the use of KS over Shapiro and Wilk normality test

    Hello there. I am testing my data distribution for normality using both Shapiro Wilk and Kolmogorov and Smirnov tests in SPSS. S&W reveals that the...

    Started by skoui‎, 04-22-2014 02:43 PM
    kolmogorov-smirnoff, normality, normality test, shapiro-wilk test
    • Replies: 4
    • Views: 1,960
    04-22-2014, 06:22 PM Go to last post
  53. Calculate sample size - unknown standard deviation

    Hi, I've searched the web, my text, youtube videos etc. and can't find an explanation. Given in the problem: 99% confidence level which we...

    Started by SS_H‎, 04-22-2014 04:13 PM
    • Replies: 0
    • Views: 1,720
    04-22-2014, 04:13 PM Go to last post
  54. Serious Help with confidence intervals for pop proportions and mean

    I honestly need a lot of help with this one im so confused these questions The Mars Candy Company claims that the mean number of candies in each...

    Started by john108‎, 04-22-2014 02:29 PM
    • Replies: 0
    • Views: 1,284
    04-22-2014, 02:29 PM Go to last post
  55. Reason of using Peason distribution over Normal distribution?

    Dear all, (Sorry about the typo, it is "Pearson" Not "Peason".) I am running an analysis of a manufacturing process flow. The measurement...

    Started by Lawrence‎, 04-22-2014 05:08 AM
    • Replies: 1
    • Views: 1,043
    04-22-2014, 08:09 AM Go to last post
  56. Correlation Across Time Help?

    Hi I'm a bit lost as to how to calculate the correlation between two groups of numbers across time. I'd like to see if one group, taken from the...

    Started by bataille‎, 04-22-2014 05:46 AM
    correlation, difference, significance, time
    • Replies: 1
    • Views: 1,358
    04-22-2014, 08:03 AM Go to last post
  57. SPSS help

    Hi Can you help me with spss? where should i enter the pretest scores and post test scores of a control group and an experimental group?

    Started by blueblooded‎, 04-22-2014 01:17 AM
    • Replies: 1
    • Views: 1,406
    04-22-2014, 04:23 AM Go to last post
  58. No margins for chi-squared test with multiple categories?

    This post has been deleted

    Started by sevenof9‎, 04-21-2014 09:57 PM
    chi-square, margin of error, multiple comparisons
    • Replies: 0
    • Views: 1,418
    04-21-2014, 09:57 PM Go to last post
  59. Interpreting r for non-significant results

    Hi, Quick question about the interpretation of effect sizes. I was taught that (in line with APA formatting) you should always report an...

    Started by coffeee‎, 04-17-2014 11:57 PM
    • Replies: 7
    • Views: 6,040
    04-21-2014, 09:02 PM Go to last post
  60. Which statistic should be used for each problem?

    Hi I have a control group and an experimental group. I gave each a pretest and a post test. Which statistic should I use to get the results? Is it...

    Started by blueblooded‎, 04-21-2014 10:06 AM
    • Replies: 4
    • Views: 1,805
    04-21-2014, 03:24 PM 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