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Forum: Statistics

Statistics course and homework discussion. Elementary statistics.

  1. 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: 66,920
    09-30-2005, 09:44 AM Go to last post
  2. 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: 197,089
    07-16-2014, 11:01 AM Go to last post
  1. Chi-Squared help

    Can anyone help me? I've been trying to connect all the elements need below, but I just cant! Can anyone tell me how chi-squared and the...

    Started by Zell49‎, 04-23-2007 06:29 PM
    • Replies: 2
    • Views: 3,840
    04-25-2007, 07:52 PM Go to last post
  2. Chi square help

    Dear All, I would like to ask for your help. I have a problem that I could not solve. The problem is the following: There are A, B, C ......

    Started by dani‎, 04-24-2007 09:21 AM
    • Replies: 1
    • Views: 2,318
    04-26-2007, 03:37 AM Go to last post
  3. Lightbulb (bio)equivalence tests: acceptable difference

    As you may know, (bio)equivalence tests are tests that are able to show equivalence between two compared groups, other than the more common tests...

    Started by Afterburn‎, 04-26-2007 07:40 AM
    • Replies: 0
    • Views: 3,510
    04-26-2007, 07:40 AM Go to last post
  4. significantly below chance?

    im doing a project and someone's performance on a test was 8 out of 48. is there a statistical test i can do to show this was signigicantly below...

    Started by e.stevens23‎, 04-20-2007 01:26 AM
    • Replies: 3
    • Views: 6,473
    04-26-2007, 07:47 AM Go to last post
  5. Help: Stats Project

    The project is to run regression analysis on 2 stocks compared to the S&P 500 and then do a write up about it. I did the regression analysis on excel...

    Started by StatsKills‎, 04-26-2007 12:00 AM
    • Replies: 2
    • Views: 3,658
    04-26-2007, 09:06 AM Go to last post
  6. 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: 8,169
    04-26-2007, 02:20 PM Go to last post
  7. Tests for Proportions

    :wave: In a hypothesis test for a proportion, why isn't it necessary to apply a continuity correction when converting phat to a z value?

    Started by JanNY47‎, 04-27-2007 09:38 AM
    • Replies: 0
    • Views: 2,380
    04-27-2007, 09:38 AM Go to last post
  8. Bowker

    How can I make a Bowker test in either spss or R? Please help, urgent! Thanks in advance Daniel

    Started by dani‎, 04-28-2007 08:47 AM
    • Replies: 0
    • Views: 1,969
    04-28-2007, 08:47 AM Go to last post
  9. Mann whitney U help!

    Hiya, I have done 5 seperate mann whitney u tests, but I am having trouble finding the significance of my results. One book says to use the same...

    Started by fat_pie‎, 04-28-2007 09:06 AM
    • Replies: 0
    • Views: 5,076
    04-28-2007, 09:06 AM Go to last post
  10. Question reporting linear mixed effects

    Hello, I am fitting a linear mixed effects model to data of a psycholinguistic experiment in which participants had to rate the naturalness of...

    Started by Tiepies‎, 04-29-2007 04:37 AM
    • Replies: 0
    • Views: 4,615
    04-29-2007, 04:37 AM Go to last post
  11. Paired T-Test & Cross Validation

    I understand how to calculate the paired t-test but how should things be done differently if you're using 10 fold cross-validation? Also if I...

    Started by terminator‎, 04-29-2007 12:08 PM
    • Replies: 0
    • Views: 3,145
    04-29-2007, 12:08 PM Go to last post
  12. stats question

    can anyone help me with following Jim's chocolate chip cookies advertise an average of 5 chocolate chips per cookie. let x be the number of...

    Started by equery‎, 04-29-2007 02:40 PM
    • Replies: 0
    • Views: 2,269
    04-29-2007, 02:40 PM Go to last post
  13. another stats question

    the mahi rent-a-car company is intgerested in estimating the mean number of miles its cars areg driven on a particular holiday. it has 23000 cars...

    Started by equery‎, 04-29-2007 02:46 PM
    • Replies: 0
    • Views: 2,299
    04-29-2007, 02:46 PM Go to last post
  14. please help... retaking an exam on t scores,

    Hi, I'm new here. I found this place on Google after two days of studying like mad and not understanding anything. well, sort of. Let me...

    Started by raefactor‎, 04-14-2007 09:18 PM
    • Replies: 2
    • Views: 2,248
    04-29-2007, 03:14 PM Go to last post
  15. Independent t-test

    Alright I've really been struggling with this one so maybe I can find some help here. If, with the use of the independent t test, the null...

    Started by Joshu‎, 04-27-2007 11:51 PM
    • Replies: 1
    • Views: 4,412
    04-30-2007, 07:49 AM Go to last post
  16. Significance (research gone wrong, please help!)

    my convinience sample size was 148, i distributed questionnares (made up of rating scales) to all those in the sample. i had a response rate of 25. ...

    Started by ka_day‎, 04-30-2007 09:03 AM
    • Replies: 0
    • Views: 2,384
    04-30-2007, 09:03 AM Go to last post
  17. Smile bonferroni's multiple comparison

    hi, do i have to use bonferroni's multiple comparison adjustment when i am doing analyses on multiple measurment of the same speciemn? thanxx

    Started by mia‎, 05-01-2007 10:22 AM
    • Replies: 0
    • Views: 2,894
    05-01-2007, 10:22 AM Go to last post
  18. Help:Chi squared for homogeneity or goodness-of-fit?

    OK, I have removed the old message.

    Started by markmarkmark‎, 05-01-2007 06:14 PM
    • Replies: 0
    • Views: 3,260
    05-01-2007, 06:14 PM Go to last post
  19. An interesting Bayesian question

    Suppose a random sample of size n is from uniform distribution U(0, exp(gamma)), suppose the prior distribution of gamma is N(a, b), how to find the...

    Started by sweetie‎, 05-02-2007 12:05 AM
    • Replies: 0
    • Views: 1,712
    05-02-2007, 12:05 AM Go to last post
  20. Normal Distribution

    Hi there , Im new to this forum. Does anyone know where I canfind notes on normal distribution? JAmes

    Started by jnm008‎, 05-02-2007 05:31 AM
    • Replies: 0
    • Views: 1,824
    05-02-2007, 05:31 AM Go to last post
  21. Gold standart

    I have to devices Gold standard (PH) New Device 5.4 5.2 5.4 5.1 7 ...

    Started by ledamir‎, 05-02-2007 06:17 AM
    • Replies: 0
    • Views: 1,961
    05-02-2007, 06:17 AM Go to last post
  22. Stats Problem Help

    I am reviewing some old stats work to freshen up for a new job..They gave me some review stuff and this was one of the questions I am somewhat stuck...

    Started by Mike87T‎, 05-02-2007 09:16 AM
    • Replies: 0
    • Views: 2,377
    05-02-2007, 09:16 AM Go to last post
  23. Test for differences in proportions?

    Hello! I conduct a survey in which I have a very large (approximately 800,000 records) set of numerical data (the data is financial data ...

    Started by Julie99‎, 05-02-2007 05:57 PM
    • Replies: 0
    • Views: 2,551
    05-02-2007, 05:57 PM Go to last post
  24. Help with effect size on repeated measures

    Hi, I need some help on effect size on project I'm doing. Let me explain about the project. I measure the jump height on 30 men and 30 women at 7...

    Started by jmanqr‎, 05-02-2007 08:26 PM
    • Replies: 0
    • Views: 3,172
    05-02-2007, 08:26 PM Go to last post
  25. Hypothesis Testing Help!

    If anyone could help me out with this, I'd appreciate it. Looking at the increase in nicotine levels from 1998(1.72mg) to 2004(1.89mg) here. One...

    Started by Dante5609‎, 05-02-2007 05:31 PM
    • Replies: 1
    • Views: 2,425
    05-03-2007, 07:37 AM Go to last post
  26. How to determine whether 2 slopes are different when they are correlated?

    Hi! Let's say I have a variable "A" that I believe measures a trait, say, "greed". I show 2 groups of pictures (say, 10 pics in each group) to...

    Started by Hanshananigan‎, 05-03-2007 09:05 AM
    • Replies: 0
    • Views: 2,300
    05-03-2007, 09:05 AM Go to last post
  27. A test for a 'buffer' hypothesis

    Just wondered if anyone knows how I can test the hypothesis: 'Higher levels of Job Control act as a buffer against fatigue related to Job Demands' ...

    Started by Macka‎, 05-03-2007 10:26 PM
    • Replies: 0
    • Views: 1,515
    05-03-2007, 10:26 PM Go to last post
  28. Chi-square

    The chi-squares are all of the form nc. Two situations: a) If the model does not hold, c converges to a positive constant C when sample size goes...

    Started by chidude‎, 05-04-2007 07:17 AM
    • Replies: 0
    • Views: 2,511
    05-04-2007, 07:17 AM Go to last post
  29. Help with Satorra & Bentler

    I have a problem regarding Satorra & Bentler: Could anyone give a precise explanation of SB statistics and what it tends to do if there is excess...

    Started by Everest‎, 05-04-2007 07:04 AM
    • Replies: 1
    • Views: 2,432
    05-04-2007, 02:20 PM Go to last post
  30. Statistical project

    Dear all, I have a small statistical project for my Intro to Statistics class. And I have decided to choose to interpret and compare markets in...

    Started by Ecce Homo‎, 05-04-2007 03:21 PM
    • Replies: 0
    • Views: 1,902
    05-04-2007, 03:21 PM Go to last post
  31. Question How do I calculate tolerance values in a ANOVA?

    I need to understand how to hand calculate the tolerance values that are shown in an ANOVA table. This value has something to do with the multiple...

    Started by DOE Student‎, 05-04-2007 05:38 PM
    • Replies: 0
    • Views: 4,917
    05-04-2007, 05:38 PM Go to last post
  32. Multicolinearity, eigenvalues

    How to find out the variables involved in a sets of multi-collinearity by the mean of the eigenvalues and condition number ?

    Started by sokol‎, 05-05-2007 03:23 PM
    • Replies: 0
    • Views: 2,051
    05-05-2007, 03:23 PM Go to last post
  33. what is the minimum sample size for standard deviation?

    Hi. Just a quick question. Can you perform a standard deviation test if n=2? Thank you.

    Started by megano‎, 05-05-2007 05:20 PM
    • Replies: 0
    • Views: 7,153
    05-05-2007, 05:20 PM Go to last post
  34. Finding Sample Standard Deviation

    Given this information, how would you know the sample standard deviation? 1) Your company has a contract to provide 3,000,000 bolts to a Chinese...

    Started by Mike87T‎, 05-06-2007 06:09 PM
    • Replies: 0
    • Views: 2,155
    05-06-2007, 06:09 PM Go to last post
  35. Additional Exercise for the book - A Course in Large Sample Theory" by Ferguson.

    The link is: http://www.math.ucla.edu/%7Etom/LST/lst.html I need help in solving some problems in section 5, 8, and 14. Does anyone have the...

    Started by sweetie‎, 05-06-2007 07:33 PM
    • Replies: 0
    • Views: 2,536
    05-06-2007, 07:33 PM Go to last post
  36. study abroad

    hi to all, planstudyabroad.com are providing online free consultancy services for foreign education to all around the world. i got much useful...

    Started by allisfriend23‎, 05-07-2007 08:57 AM
    • Replies: 0
    • Views: 1,624
    05-07-2007, 08:57 AM Go to last post
  37. Conditions Number, Collineartiy detection

    :shakehead Is there someone who can help me how to use the condition numbers for multicollinarity detection ????

    Started by sokol‎, 05-07-2007 03:16 PM
    • Replies: 0
    • Views: 2,061
    05-07-2007, 03:16 PM Go to last post
  38. Comparing two lines?

    Hey all, I'm just having a little trouble figuring out how to do this...I have a linear regression line, and am trying to statistically compare it...

    Started by ThePensive‎, 05-08-2007 02:55 PM
    • Replies: 0
    • Views: 2,675
    05-08-2007, 02:55 PM Go to last post
  39. Question AS Statistics - Time Series Analysis (S2)

    Hello all My teacher was teaching us Time Series Analysis qiute a while ago and when he was explaining it i didn't understand properly and didn't...

    Started by aadd‎, 05-09-2007 10:24 AM
    • Replies: 0
    • Views: 4,202
    05-09-2007, 10:24 AM Go to last post
  40. Variance/Normal Distributions

    I am currently in a psych tests and measurements class. I have a couple of questions that I can't figure out or find in the book. They are multiple...

    Started by shae13v‎, 01-26-2006 10:04 AM
    • Replies: 11
    • Views: 5,210
    05-09-2007, 10:38 AM Go to last post
  41. I need a Professional statistician for answering the following question How I canProf

    Hello, every body, First of All I would like to introduce myself; I am a researcher in the field of plant physiology who do not have enough...

    Started by normalman‎, 05-10-2007 02:20 AM
    • Replies: 0
    • Views: 1,703
    05-10-2007, 02:20 AM Go to last post
  42. Basic Probability

    I need some help getting started with this question..... There N quantity of tourists on a bus and there are n quantity of children amongst them....

    Started by Kaliningradlad‎, 05-08-2007 06:23 AM
    • Replies: 2
    • Views: 2,827
    05-12-2007, 08:50 AM Go to last post
  43. Talking ANOVA - Post Hoc Testing Problem.. Help!!

    Good Morning all, This is my first post.. I am so excited that this forum exists.. I am running an ANOVA at the moment, with a DV, and 3 IV's....

    Started by Leigh26‎, 05-12-2007 09:04 PM
    • Replies: 0
    • Views: 2,155
    05-12-2007, 09:04 PM Go to last post
  44. Please Help

    Hi I have a problem at work. I don't know why I got it but there you go. I work in a hospital and we are changing how we provide care. This...

    Started by scotchpie‎, 05-14-2007 03:20 AM
    • Replies: 0
    • Views: 2,011
    05-14-2007, 03:20 AM Go to last post
  45. Probability Question

    Urn 1 has 2 white balls and 4 red balls. Urn 2 has 2 white balls and 1 red ball. a ball is then randomly picked from urn 1 and placed into urn 2...

    Started by amavadia‎, 05-11-2007 06:38 PM
    • Replies: 2
    • Views: 2,463
    05-14-2007, 03:24 AM Go to last post
  46. Suitable statistic test

    Hello, I have been reading a scientific journal and I want to check the statistical significance between two groups in their results. I have the...

    Started by sunflower‎, 05-10-2007 09:54 AM
    • Replies: 1
    • Views: 2,694
    05-14-2007, 03:45 AM Go to last post
  47. Unhappy please help

    I've been looking over some problems to see what tests and techniques i need to use but it's been a long while since i've worked on statistics, so...

    Started by stat84‎, 05-08-2007 02:51 PM
    • Replies: 1
    • Views: 1,702
    05-14-2007, 03:55 AM Go to last post
  48. Recommended Text

    Hello all! I am an undergrad who is wrapping up my BA in a few weeks and I am going to be attending graduate school in the Spring of 08; majoring...

    Started by statsnoviceGRRR‎, 05-05-2007 11:12 PM
    • Replies: 3
    • Views: 5,405
    05-15-2007, 01:13 AM Go to last post
  49. Artificially create biased sample for low response

    Hi all, I am building a binary 0/1 logistic model where the response rate is very low (0.6%, 77000 out of 12000000). One suggestion was to...

    Started by anindya_mozumdar‎, 05-15-2007 09:29 AM
    • Replies: 0
    • Views: 2,290
    05-15-2007, 09:29 AM Go to last post
  50. Which test?

    I have been doing some research into sleep quality. I have two groups of people, labelled as good and bad. Each person has filled in Using the...

    Started by Confuzzled‎, 05-15-2007 10:26 AM
    • Replies: 0
    • Views: 2,161
    05-15-2007, 10:26 AM Go to last post
  51. Real-life Ballot problem

    Wonder if anyone can help me. There has been an oversubscription of applications for tickets for a major sporting event so the organisers have...

    Started by flagpolecorner‎, 05-15-2007 01:04 PM
    • Replies: 0
    • Views: 3,228
    05-15-2007, 01:04 PM Go to last post
  52. Help needed on problem, URGENT! Thanks in advance.

    I'm stuck on figuring otu the mechanism required to solve these sample mean problems when you need to compare two different samples. Check it...

    Started by kellan‎, 05-15-2007 12:43 AM
    • Replies: 2
    • Views: 5,211
    05-16-2007, 03:49 AM Go to last post
  53. Generating Random Numbers

    Hi guys i have a couple of Qs regarding generating random numbers: 1. Suppose you are given only 3 very basic tools: a uniform random number...

    Started by wlmi‎, 05-16-2007 06:57 AM
    • Replies: 0
    • Views: 2,925
    05-16-2007, 06:57 AM Go to last post
  54. autoregression, autocorrelation

    Hi, I am estimating the following regression which contains lagged dependent variables and lagged indepedent variables and I am worried about the...

    Started by sun‎, 05-16-2007 11:35 AM
    • Replies: 0
    • Views: 3,084
    05-16-2007, 11:35 AM Go to last post
  55. stat problem

    Suppose that your sister is a Floridian orange farmer. She followed a particular orange growing method (i.e. certain type of fertilizer, irrigation...

    Started by tiannagal4u‎, 05-16-2007 04:01 PM
    • Replies: 0
    • Views: 2,099
    05-16-2007, 04:01 PM Go to last post
  56. Unhappy Survey Response Problem

    I hope someone will help me with this. The problem I have to work out is a scenario involving a survey. Let's say a survey is administered to 985...

    Started by Blogma‎, 05-16-2007 11:53 AM
    • Replies: 1
    • Views: 2,873
    05-16-2007, 11:48 PM Go to last post
  57. Measurements of biodiversity

    When considering the biodiversity of an aquatic system after a human caused disaster (chemical spill) what would be a adequate measure of...

    Started by shift_540‎, 05-18-2007 02:00 AM
    • Replies: 1
    • Views: 2,603
    05-18-2007, 04:19 AM Go to last post
  58. Which statistical test should I use

    In an experiment to test the hypothesis of group polarization there are two groups of 120 militarists and 80 pacifists. Both groups were asked to...

    Started by felix9999‎, 05-18-2007 06:16 AM
    • Replies: 1
    • Views: 2,523
    05-19-2007, 05:57 PM Go to last post
  59. What's the point in T scores?

    Hi all, I have a questionnaire thay converts raw scores to T scores (scores with a mean of 50 and std. dev of 10). I have run some analyses and...

    Started by Kat‎, 05-16-2007 09:16 AM
    • Replies: 1
    • Views: 2,407
    05-19-2007, 09:25 PM Go to last post
  60. Which statistical test?

    Hi I have an exam on Monday and am trying to work out on practice question we received in class. It asks us to identify and match the appropriate...

    Started by ams‎, 05-18-2007 01:17 AM
    • Replies: 1
    • Views: 2,718
    05-21-2007, 07:15 PM Go to last post

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