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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: 196,748
    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: 66,753
    09-30-2005, 09:44 AM Go to last post
  1. 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: 10,845
    11-13-2006, 03:00 PM Go to last post
  2. Exclamation I need help!

    this message has been deleted for his autor

    Started by Pietro‎, 11-13-2006 02:16 PM
    • Replies: 0
    • Views: 2,347
    11-13-2006, 02:16 PM Go to last post
  3. Average of sample means

    If random samples, each with n=100 scores, are selected from a normal population with mu=1000 and standard deviation=50, and the mean is calculate...

    Started by starfish794‎, 11-12-2006 02:57 PM
    • Replies: 1
    • Views: 3,344
    11-13-2006, 12:39 AM Go to last post
  4. sample mean z-score

    If a sample is selected from a normal population, then the probability that the sample mean will have a z-score less than z=2.55 is.......?

    Started by starfish794‎, 11-12-2006 03:01 PM
    • Replies: 1
    • Views: 8,280
    11-13-2006, 12:35 AM Go to last post
  5. Please someone help me

    4. A political strategist believes that 58% of voters in a certain state support his candidate. He then commissions a poll of 600 voters and 53% of...

    Started by benchiefjr‎, 11-11-2006 11:00 PM
    • Replies: 2
    • Views: 8,850
    11-13-2006, 12:29 AM Go to last post
  6. Multicollinearity....

    ... ok, anyone's thoughts on this would be great. I have a result in which my two IV predictors cancel out an IV, DV relationship. Thanks to John for...

    Started by Zzzz‎, 11-11-2006 04:57 PM
    • Replies: 0
    • Views: 3,145
    11-11-2006, 04:57 PM Go to last post
  7. Skewness and Kurtosis

    I have to 'show the standard error of the skewness and kurtosis as a footnote to a table' - any ideas on how this is expressed? I thought it might be...

    Started by Zzzz‎, 11-11-2006 03:47 AM
    • Replies: 2
    • Views: 3,720
    11-11-2006, 04:45 PM Go to last post
  8. Hypothesis Testing

    Hi, New member here.:) I studied Maths and Further Maths at A Level but it's been 2 years now since i completed them so haven't done any Stats...

    Started by PeoplesChamp‎, 11-09-2006 08:18 PM
    • Replies: 2
    • Views: 1,918
    11-10-2006, 06:49 PM Go to last post
  9. population sampling question

    Hello I am having a difficulty with a homework problem from my basic statistics class. The problem: A weight loss trial involving a new diet is...

    Started by slipperyrck2006‎, 11-09-2006 12:46 PM
    • Replies: 2
    • Views: 2,267
    11-10-2006, 02:38 PM Go to last post
  10. Might be a silly question about t-tests but...

    ...i really need some advice about how to go about comparing some means. Basically, I have the means and standard deviations for three different...

    Started by Zzzz‎, 11-10-2006 10:14 AM
    • Replies: 8
    • Views: 3,047
    11-10-2006, 01:33 PM Go to last post
  11. Clueless

    I am in a really big fix. I have a midterm today and I just came back from a two week vacation to the Carribean...and I don't get the missed classes...

    Started by ERICKSJH‎, 11-09-2006 11:49 AM
    • Replies: 2
    • Views: 1,837
    11-10-2006, 09:27 AM Go to last post
  12. Help with hypothesis problem - Type I or Type II error

    Please let me know if I did this problem correctly. Assme that a hypothesis test of the given claim will be conducted. Identify the type I or...

    Started by maharriso‎, 11-07-2006 10:23 AM
    • Replies: 2
    • Views: 6,708
    11-09-2006, 12:36 PM Go to last post
  13. What is the best method to use?

    Hello everyone, I am no stats expert and I am just in my second year at University. I am doing a project, and I was not sure what would be the best...

    Started by statMan‎, 11-09-2006 11:31 AM
    • Replies: 0
    • Views: 2,699
    11-09-2006, 11:31 AM Go to last post
  14. should I use an anova?

    I have numbers of individuals in 3 groups (p, i and g) over 14 different tide heights. These tide heights have been grouped into Low, Mid and...

    Started by jude‎, 11-09-2006 07:35 AM
    • Replies: 1
    • Views: 1,956
    11-09-2006, 09:12 AM Go to last post
  15. homework help

    Hi everyone, I just discovered this forum today, and boy am I glad :) I'm in preparation for my final exam and I've just realised I don't know what...

    Started by julie‎, 11-08-2006 08:31 PM
    • Replies: 4
    • Views: 2,440
    11-09-2006, 07:45 AM Go to last post
  16. Binomial Distribution & qa optimization

    Hi I have a question I was hoping someone could help with relating to Binomial distribution and expected value. -- In a computer chip...

    Started by aqisha‎, 11-06-2006 05:51 AM
    • Replies: 1
    • Views: 3,126
    11-08-2006, 05:17 PM Go to last post
  17. Repeated Measures ANOVA Question

    Hi All, I've done a Repeated Measures ANOVA assessing mood during different kinds of weather. 5 subjects were asked to rate their mood on...

    Started by MdmeBtrfly‎, 11-08-2006 11:32 AM
    • Replies: 2
    • Views: 3,818
    11-08-2006, 04:47 PM Go to last post
  18. Is the correlation reliable?

    Hello!!! I hope you can help me with this question. I have a set of daily price data for six months for two commodities. I calculated the...

    Started by zealot‎, 11-05-2006 01:01 PM
    • Replies: 5
    • Views: 4,753
    11-08-2006, 03:42 PM Go to last post
  19. Help with P-value problem

    I need help solving this problem Find the P-value for the indicated hypothesis test. An airline claims that the no-show rate for passengers booked...

    Started by maharriso‎, 11-07-2006 10:38 AM
    • Replies: 1
    • Views: 4,480
    11-08-2006, 12:53 PM Go to last post
  20. Applying the Q test twice to the same data set (Why not?)

    Hello Everyone. Scenario You apply the Q test to a data set and find that you may indeed remove a particular datum from the data set. ...

    Started by B.W. McCann‎, 11-07-2006 02:01 AM
    • Replies: 3
    • Views: 2,699
    11-08-2006, 12:28 AM Go to last post
  21. Null hypothesis problem

    I need help with this problem. Not sure if I chose the right answer. Express the null hypothesis HO and the alternative hypothesis H1 in symbolic...

    Started by maharriso‎, 11-07-2006 10:58 AM
    • Replies: 1
    • Views: 5,241
    11-07-2006, 05:38 PM Go to last post
  22. Question How to interprate type3 test with 0 df?

    I got a problem to interpret these output. LR Statistics For Type 3 Analysis ...

    Started by yingxie‎, 11-07-2006 04:35 PM
    • Replies: 0
    • Views: 2,246
    11-07-2006, 04:35 PM Go to last post
  23. Moved: Can you get me started?

    Started by teacher2be‎, 12-25-2006 09:46 PM
    • Replies: -
    • Views: -
    11-07-2006, 03:42 PM Go to last post
  24. some help with my stats module please!

    would be grateful to anyone who could start me off here!! in a sociology survey, independent random samples of single partnered and...

    Started by ouragan‎, 11-07-2006 08:03 AM
    • Replies: 2
    • Views: 1,978
    11-07-2006, 12:04 PM Go to last post
  25. Left-Tailed Hypothesis problem

    I am having trouble solving this problem A manufacturer finds that in a random sample of 100 of its CD players, 96% have no defects. The...

    Started by maharriso‎, 11-06-2006 01:35 PM
    • Replies: 2
    • Views: 6,700
    11-07-2006, 11:48 AM Go to last post
  26. joint prob. density func.

    Let f(x,y) = 24xy for 0<=x<=1, 0<=y<=1, 0<= (x + y)<=1 = 0 otherwise. a. Verify that f(x,y) is a joint...

    Started by teacher2be‎, 11-06-2006 11:29 AM
    • Replies: 2
    • Views: 2,693
    11-07-2006, 01:30 AM Go to last post
  27. Population Mean problem

    I am having trouble solving this problem Determine whether the given conditons justify testing a claim about a population mean. The sample size...

    Started by maharriso‎, 11-06-2006 01:43 PM
    • Replies: 1
    • Views: 4,988
    11-07-2006, 12:30 AM Go to last post
  28. I need help, please:)

    Okay so the problem is as follows : A study of children in Caithness,Scotland classified them according to hair color. This table reports...

    Started by Graceisgoen1285‎, 11-06-2006 02:52 PM
    • Replies: 1
    • Views: 2,367
    11-06-2006, 10:16 PM Go to last post
  29. I need help with interpretation of P-value please

    Hello I need anyone who understands these things to help with interpretation of an output from minitab please. I am looking at whether results...

    Started by bnquinn‎, 10-18-2006 05:44 PM
    • Replies: 4
    • Views: 4,914
    11-06-2006, 05:03 PM Go to last post
  30. Experimental design...plz help !!

    1) A corporation employs 2000 male and 500 female engineers. A stratified random sample of 200 male and 50 female engineers gives each engineer 1...

    Started by xjinax8807‎, 11-04-2006 04:56 PM
    • Replies: 3
    • Views: 9,245
    11-05-2006, 11:32 PM Go to last post
  31. joint probability

    Three marbles are chosen without replacement from a box containing 5 white and 7 blue marbles. Let Xi = 1 if the ith marble is white and xi = 0...

    Started by teacher2be‎, 11-05-2006 12:17 PM
    • Replies: 1
    • Views: 4,384
    11-05-2006, 06:19 PM Go to last post
  32. gamma distribution

    Show that the sum of n independent identically distributed exponential random variables with parameter theta has a gamma distribution and give its...

    Started by teacher2be‎, 11-05-2006 12:19 PM
    • Replies: 1
    • Views: 7,504
    11-05-2006, 05:29 PM Go to last post
  33. Higher Order Factorial Designs

    Hi There, I don't have a specific homework question. I was wondering, however, if any kind person could point me out to a website or book...

    Started by MdmeBtrfly‎, 11-03-2006 07:17 PM
    • Replies: 1
    • Views: 4,075
    11-04-2006, 07:48 AM Go to last post
  34. Moved: Spss Help!!!

    Started by ez_e‎, 12-25-2006 09:46 PM
    • Replies: -
    • Views: -
    11-03-2006, 01:22 AM Go to last post
  35. Mean of random sampling

    Hello there, I was wondering if someone could help me with a portion of my stats homework. Basically in part of the homework I had to take a...

    Started by bgrove‎, 11-02-2006 10:51 PM
    • Replies: 2
    • Views: 2,389
    11-02-2006, 11:49 PM Go to last post
  36. Help with margin of error problem

    I need help with this problem. I have been reading in my textbook but I still cannot figure it out. I have already figured out that 1.96 is the...

    Started by maharriso‎, 11-02-2006 09:25 AM
    • Replies: 1
    • Views: 5,163
    11-02-2006, 10:59 AM Go to last post
  37. HELP! easy question, but im stuck

    HELP!!! if the probability equals .03 that any randomly selected person from the general population has an IQ of 130 or above, what is the...

    Started by georgeallencheeze‎, 11-01-2006 09:52 PM
    • Replies: 2
    • Views: 3,227
    11-01-2006, 10:11 PM Go to last post
  38. Hypothesis testing

    I have an assignment due in a little while and I would like to double check my answers... it's basically true and false of m/c 1. The probability...

    Started by always_confused‎, 11-01-2006 06:32 PM
    • Replies: 1
    • Views: 3,564
    11-01-2006, 07:55 PM Go to last post
  39. Age distribution between groups???

    I am hoping to test whether there is a statistical difference between two groups of participants between the ages of 2-7. I know by looking at...

    Started by stacyrobinson‎, 11-01-2006 05:30 PM
    • Replies: 1
    • Views: 2,482
    11-01-2006, 07:50 PM Go to last post
  40. 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: 2,815
    11-01-2006, 01:44 PM Go to last post
  41. Moved: Minitab?????

    Started by stats101jmhs‎, 12-25-2006 09:46 PM
    • Replies: -
    • Views: -
    10-31-2006, 12:39 PM Go to last post
  42. Question: Adjusting kappa for high absent ratings

    I am calculating kappa on a scale for which several variables had high absent ratings. Can anyone shed some light on how to adjust kappa for high...

    Started by hunter1p‎, 10-30-2006 04:03 PM
    • Replies: 1
    • Views: 1,966
    10-30-2006, 05:17 PM Go to last post
  43. Expected Values HELP!

    Here is the question: What is the expected value of a dollar bet? There are three wheels, each with 20 spaces. Reel one: 10 cherries, 6...

    Started by Angie Thompson‎, 10-28-2006 06:37 PM
    • Replies: 2
    • Views: 2,775
    10-30-2006, 03:07 PM Go to last post
  44. Do I use Binomdist?

    If the manufacturer is allowed 2 footballs out of a random selected 10 to be more than X circumference. The manufacturer has found that 1 out of ten...

    Started by Hopeful‎, 10-26-2006 10:56 PM
    • Replies: 3
    • Views: 2,218
    10-30-2006, 11:51 AM Go to last post
  45. Question puzzled over which test to use

    I have a number of hypotheses relating to temporal trends in wading bird diversity and abundance that need testing. Am I right in thinking that when...

    Started by jude‎, 10-24-2006 12:56 PM
    • Replies: 2
    • Views: 2,289
    10-30-2006, 03:47 AM Go to last post
  46. Help in Generalized Slutsky

    does anyone have any resources on the proof for the generalized slutsky theorem. Xn converges in dist to X, Yn converges in dist to c, then...

    Started by johnp‎, 10-26-2006 02:51 PM
    • Replies: 1
    • Views: 2,729
    10-29-2006, 03:11 PM Go to last post
  47. Determining if normal distribution

    I am working on an assignment where I need to use either ANOVA or KRUSKAL_WALLIS testing. ANOVA assumes data with normal distribution...how do I...

    Started by mbrother11‎, 10-28-2006 03:15 PM
    • Replies: 1
    • Views: 3,407
    10-29-2006, 07:58 AM Go to last post
  48. How do you interpred the DS when p-value shows normality but skewness and kurtosis

    How do you interpret the DS when p-value shows normality but skewness and kurtosis differ correspondingly from 0 and 3. Tzveta

    Started by Tzveta Iordanova‎, 10-25-2006 10:48 AM
    • Replies: 1
    • Views: 1,939
    10-27-2006, 09:49 PM Go to last post
  49. Results of election

    Hi, I just has a question in regards to what number to use for sample size.....I've showed my work below and just want someone to look over it ...

    Started by joejohn‎, 10-26-2006 09:47 PM
    • Replies: 1
    • Views: 2,261
    10-27-2006, 05:15 PM Go to last post
  50. Help!!!

    I am stuck for 2 hrs! please help!! I have a 2 by 4 design: amount of eating (independent variable, out of 100) on stress (low vs high) and time...

    Started by 12345‎, 10-27-2006 12:35 AM
    • Replies: 0
    • Views: 2,029
    10-27-2006, 12:35 AM Go to last post
  51. Stats help

    Hi all, I have a question: If I have five groups, overall significant one-way Anova, and I want to examine all pairwise tests, considering both...

    Started by 12345‎, 10-26-2006 10:21 PM
    • Replies: 1
    • Views: 2,554
    10-26-2006, 11:55 PM Go to last post
  52. Null Hypothesis Significance Testing

    Hi All, I am doing a question about NHST in my class, and I'm just stuck on one issue. I know what to do, but all of the data I'm working...

    Started by MdmeBtrfly‎, 10-26-2006 08:15 PM
    • Replies: 1
    • Views: 2,645
    10-26-2006, 08:44 PM Go to last post
  53. Discrete or Continuous?

    On my homework the following problems were giving me trouble as to whether or not these are discrete or continuous? The number of tails that...

    Started by statsstudent‎, 10-25-2006 05:37 PM
    • Replies: 3
    • Views: 3,622
    10-26-2006, 11:16 AM Go to last post
  54. 95% confidence interval help

    How much money does the average professional football fan spend on food at a single football game? That question was posed to ten randomly selected...

    Started by sinful‎, 10-25-2006 04:50 PM
    • Replies: 8
    • Views: 9,099
    10-25-2006, 09:36 PM Go to last post
  55. trending method for count data

    Does anyone have a suggestion on a charting/trending method for count data? I have reason to believe my data is not Poisson distributed because in...

    Started by statgirl26‎, 10-25-2006 11:12 AM
    • Replies: 1
    • Views: 2,157
    10-25-2006, 08:47 PM Go to last post
  56. Post Please help

    My question is about z scores. To calculate probablity in a normal distribution, where we know mean and standard deviation we calculate z and then...

    Started by e09pka‎, 10-25-2006 11:22 AM
    • Replies: 1
    • Views: 2,282
    10-25-2006, 08:46 PM Go to last post
  57. Normal Distribution

    A set of reading scores for fourth-grade children has a mean of 25 and a standard deviation of 5. A set of scores for sixth-grade children has a mean...

    Started by Amanda8991‎, 10-25-2006 11:54 AM
    • Replies: 1
    • Views: 4,988
    10-25-2006, 08:44 PM Go to last post
  58. Z-Statistic and proportion

    Hi:) , I'm having some difficulty with this question. The question asks A matched pairs experiment compares the taste of instant versus...

    Started by jena2007‎, 10-25-2006 08:35 PM
    • Replies: 1
    • Views: 6,604
    10-25-2006, 08:39 PM Go to last post
  59. t tests

    Hello... t tests (like one sample, related samples, and independent) are just testing the mean of the samples means against the population mean,...

    Started by Christy‎, 10-22-2006 05:25 PM
    • Replies: 2
    • Views: 3,027
    10-24-2006, 06:31 PM Go to last post
  60. Help with null hypothesis and T-Statistics

    Hi:) , I'm having problems understanding null hypothesis and t-statistics. Especially this question(below): 12. You will have complete sales...

    Started by jena2007‎, 10-16-2006 09:37 PM
    • Replies: 4
    • Views: 5,725
    10-24-2006, 06:30 PM Go to last post

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