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Threads 17101 to 17160 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: 197,237
    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: 67,003
    09-30-2005, 09:44 AM Go to last post
  1. Adjusting regression for finite populations

    I have a sample of 150 from a population of 300, so when deciding whether a variable is significant in a regression I need to use a finite population...

    Started by stepha‎, 07-28-2006 04:58 AM
    • Replies: 0
    • Views: 2,699
    07-28-2006, 04:58 AM Go to last post
  2. Comparing multiple subject groups

    Hi all! I have a question regarding the analysis of some of my dissertation data. Briefly, I have data for a number of biomechanical variables...

    Started by Piltdown13‎, 07-26-2006 02:27 PM
    • Replies: 0
    • Views: 3,178
    07-26-2006, 02:27 PM Go to last post
  3. Question exam review HELP!!!

    The question is: Mr. Brown recently purchased 100 randomly selected machine scres with a defective rate of 10%. What is the probability that he...

    Started by palay8‎, 07-26-2006 01:14 AM
    • Replies: 0
    • Views: 2,584
    07-26-2006, 01:14 AM Go to last post
  4. Chi-squared Goodness of Fit Questions

    Hi folks, A request for some basic help with Chi-squared testing: Say we have two different Likert samples (strongly agree, agree, neutral,...

    Started by theswits‎, 07-18-2006 10:56 AM
    • Replies: 5
    • Views: 6,769
    07-24-2006, 07:00 AM Go to last post
  5. Confused about my data file

    I have conducted a pilot study on two individuals (Likert data). These individuals completed a survey, every three days for 8 weeks. Their data looks...

    Started by napalm‎, 07-21-2006 10:15 AM
    • Replies: 4
    • Views: 2,733
    07-23-2006, 01:27 AM Go to last post
  6. Is there software that includes post hoc tests for nonparametric data?

    Hello all, I have used the Kruskal-Wallis nonparametric test to identify if there are differences among groups. The p-value was 0, meaning there...

    Started by celibec‎, 07-22-2006 05:01 PM
    • Replies: 0
    • Views: 5,555
    07-22-2006, 05:01 PM Go to last post
  7. one sample t test (beta=0)

    Hello. I have a dumb question about one sample t test. If I want to test the hypothesis: beta=0 , what is the formula for the t statistic? Is it:...

    Started by Mightyphil‎, 07-22-2006 04:07 PM
    • Replies: 1
    • Views: 6,700
    07-22-2006, 04:37 PM Go to last post
  8. Q1 and Q3 determination from QD and MEAN

    Hi i have a problem. and i m not sure how to solve it. my question is that there are two Quartiles Q1 and Q3, their QD = 12.6 and the mean is...

    Started by zeeshanhashmi‎, 07-09-2006 07:41 AM
    • Replies: 3
    • Views: 3,764
    07-19-2006, 06:13 AM Go to last post
  9. Extracting an elusive sigma

    Can anyone help me please? I have a tubular vertical screw-elevator, a new invention! I would like to make some conclusions regarding the...

    Started by GaryJH‎, 07-18-2006 04:51 PM
    • Replies: 0
    • Views: 2,155
    07-18-2006, 04:51 PM Go to last post
  10. Cronbachs Alpha

    Okay, so I'm a student and have to calculate the reliability of a test, I have the test devided into it's various measures - only one (containing 13...

    Started by Brendan‎, 07-14-2006 11:37 PM
    • Replies: 1
    • Views: 2,696
    07-15-2006, 07:44 PM Go to last post
  11. Confidence Interval Help

    I am really stumped on this one: In a sample of 400 seeds, 240 germinated. Estimate the true germination rate with a 90% and 99% confidence...

    Started by sxg23‎, 07-12-2006 08:28 PM
    • Replies: 1
    • Views: 2,646
    07-13-2006, 04:03 PM Go to last post
  12. Question Mahalanobis distance

    Hi all, In the table of critical values for Mahalanobis distance, there is "number of variables" and "critical value". My question is, does "number...

    Started by Nin‎, 07-11-2006 01:00 AM
    • Replies: 0
    • Views: 6,155
    07-11-2006, 01:00 AM Go to last post
  13. Question Hierarchical regression

    Hi all, Just have a quick question regarding hierarchical regression. Hypothetical example: DV: happiness IV 1: age (entered in first block)...

    Started by Nin‎, 07-11-2006 12:46 AM
    • Replies: 0
    • Views: 2,582
    07-11-2006, 12:46 AM Go to last post
  14. Likert Scale Analysis

    Hello all, I am looking to apply a statistical test to some Likert data. My survey responses were scaled 1 to 5 (strongly disagree to strongly...

    Started by theswits‎, 07-04-2006 04:08 PM
    • Replies: 4
    • Views: 50,593
    07-11-2006, 12:00 AM Go to last post
  15. Homework problem

    I need help with part C of this problem. Here is what I have done so far: Suppose that the weights of adult bull mastiffs are normally...

    Started by dworla‎, 07-08-2006 03:27 PM
    • Replies: 3
    • Views: 3,160
    07-10-2006, 10:32 AM Go to last post
  16. how to analyze born dead data

    My question is basically how to analyze data that is not normally distributed not satisfies assumption of homogenous variance. Data looks kinda of...

    Started by ron‎, 07-09-2006 07:50 PM
    • Replies: 0
    • Views: 2,012
    07-09-2006, 07:50 PM Go to last post
  17. help

    the following table states the median price of new, privatley owned , single-family houses sold last year: overall $112,500 Region A $149000 ...

    Started by zena‎, 07-09-2006 03:49 PM
    • Replies: 0
    • Views: 2,000
    07-09-2006, 03:49 PM Go to last post
  18. Help Pls

    a production line is considered "out of control" when its hourly output falls more than two standard deviations below the mean hourly output for the...

    Started by zena‎, 07-09-2006 03:35 PM
    • Replies: 0
    • Views: 1,956
    07-09-2006, 03:35 PM Go to last post
  19. Homework Help

    I need help with the following problem. Find a value so that ( z > - 1.00 ) and 15 % of the area under the standard curve. If the normal...

    Started by dworla‎, 07-08-2006 03:04 PM
    • Replies: 0
    • Views: 2,258
    07-08-2006, 03:04 PM Go to last post
  20. parametric or non parametric?

    Hi, I need a help. # 1 I tested the two same product but different brand for normality and i found out that the one is normal and the other...

    Started by riza_esmilla‎, 07-08-2006 09:58 AM
    • Replies: 0
    • Views: 1,977
    07-08-2006, 09:58 AM Go to last post
  21. Residuals

    I am working on Chapter 5 of my dissertation, and I want to make sure that I am right about this. My questions concerns residuals in my crosstab...

    Started by jeaninevdv‎, 07-07-2006 01:30 PM
    • Replies: 0
    • Views: 3,151
    07-07-2006, 01:30 PM Go to last post
  22. Residuals

    I am working on Chapter 5 of my dissertation, and I want to make sure that I am right about this. My questions concerns residuals in my crosstab...

    Started by jeaninevdv‎, 07-07-2006 01:15 PM
    • Replies: 0
    • Views: 4,344
    07-07-2006, 01:15 PM Go to last post
  23. Help!!!!!!

    I have been trying to figure out these problems all week and the assignment is due tomorrow! I went to the on campus tutoring center and they...

    Started by citlalmina‎, 07-06-2006 07:58 PM
    • Replies: 0
    • Views: 2,331
    07-06-2006, 07:58 PM Go to last post
  24. Unhappy .05 level of significance?!!!

    can someone please help me out? i just need the formula. i have no idea how to even start this problem! =( once i can figure out values for X then i...

    Started by michelecm‎, 07-06-2006 02:12 PM
    • Replies: 0
    • Views: 7,082
    07-06-2006, 02:12 PM Go to last post
  25. Sample Standard Deviation

    I was given a population standard deviation but i need to find the sample standard deviation from it. My mean is 12 My st. dev is .11 My sample...

    Started by kali2729‎, 07-05-2006 02:01 PM
    • Replies: 0
    • Views: 3,687
    07-05-2006, 02:01 PM Go to last post
  26. hierarchical regression

    Hi all. I hope someone can help me because stats is definitely not my thing. I am trying to analyze some of my data for a paper and am a little...

    Started by phd2be‎, 07-01-2006 12:40 PM
    • Replies: 3
    • Views: 4,060
    07-05-2006, 10:46 AM Go to last post
  27. Unhappy mean & std deviation

    I am getting lost on this for some reason, Heres the problem: Find the mean and standard deviation of the given frequency table: Age...

    Started by sbicu‎, 06-29-2006 03:57 PM
    • Replies: 3
    • Views: 2,318
    06-30-2006, 10:31 PM Go to last post
  28. Am I doing this ANOVA right?

    Hi, although I am doing graduate work I am totally new to stats and its doing my head in! Please try to answer in plain english! I am planning...

    Started by xanderd‎, 06-29-2006 07:53 AM
    • Replies: 1
    • Views: 1,723
    06-29-2006, 05:23 PM Go to last post
  29. Gray Paths in LISREL

    Hi all, I'm wondering if anyone can tell me what the gray paths mean in LISREL. I've looked and looked, and I can't find an answer! No matter...

    Started by BTings‎, 06-25-2006 02:33 PM
    • Replies: 1
    • Views: 2,453
    06-28-2006, 05:41 PM Go to last post
  30. Likert scale testing

    I've got a likert scale: 1 2 3 4 5 I want to proof that a significant amount of respondents filled out 3 > How do I test this? I know how...

    Started by Noscito‎, 06-28-2006 05:37 PM
    • Replies: 0
    • Views: 2,867
    06-28-2006, 05:37 PM Go to last post
  31. Simplifying variance and standard deviation formulas

    I am having a problem figuring how to simplify the std variation formula and variance formula. I need to figure what I would use in place of X, in a...

    Started by phly32‎, 06-16-2006 03:48 PM
    • Replies: 1
    • Views: 11,558
    06-28-2006, 04:52 PM Go to last post
  32. adjusted residuals or standardized residuals?

    Hi, I am performing chi-square analyses for my dissertation data and am wondering about appropriate "post-hoc" analyses when chi-square values are...

    Started by rydingray‎, 06-21-2006 09:19 AM
    • Replies: 2
    • Views: 15,169
    06-27-2006, 03:58 PM Go to last post
  33. Linear Regression

    hello, I need a help understanding what to do here: let the linear model be: y=b0+b1x+w ( b0 and b1 refers to beta0 and beta1, while w...

    Started by WeeG‎, 06-16-2006 11:38 AM
    • Replies: 1
    • Views: 2,655
    06-26-2006, 03:16 PM Go to last post
  34. completely randomized ANOVA

    Forty eight subjects were randomly assigned to one of 4 treatment conditions in a study of different methods of coping with statistics exam anxiety....

    Started by skhan‎, 06-14-2006 02:24 PM
    • Replies: 1
    • Views: 3,327
    06-26-2006, 03:04 PM Go to last post
  35. Validity

    :confused: Ok, I hope you guys can help me again. Last time you were a BIG help. I feel like this is a stupid question, but I am just not getting...

    Started by MLS‎, 06-22-2006 02:49 PM
    • Replies: 2
    • Views: 3,866
    06-26-2006, 10:37 AM Go to last post
  36. Not the standard Power Calculation for Regressions?

    With 3 predictors, 120 items and total R^2 of 0.48, my analysis has adequate power using the standard power calculation that uses effect size, sample...

    Started by mishery‎, 06-26-2006 04:16 AM
    • Replies: 0
    • Views: 2,180
    06-26-2006, 04:16 AM Go to last post
  37. parametric vs non-parametric 4 beginners

    Hi. Hopefully simple analysis that I've been staring at for so long I've forgotten the basics. Masters research in medicine. 28 patients, each...

    Started by CK1‎, 06-23-2006 06:56 AM
    • Replies: 1
    • Views: 2,986
    06-24-2006, 10:53 PM Go to last post
  38. Exclamation Regression: When the intercept is zero.

    Hi, When the intercept is zero y= bx + e How do i plot the value of sum of squares function for enough values of the sllope parameter in the...

    Started by Michelle‎, 06-24-2006 08:25 PM
    • Replies: 0
    • Views: 4,386
    06-24-2006, 08:25 PM Go to last post
  39. Smile randam variable problem

    please help me in this question. ********************************************************* Let W be a random variable giving the number of heads...

    Started by h669‎, 06-22-2006 06:46 AM
    • Replies: 0
    • Views: 3,798
    06-22-2006, 06:46 AM Go to last post
  40. Nonparametric tests to support parametric tests

    hi people, i am new here so excuse my 'innocence' in statistics. I was wondering if someone could tell me if i am on the right track. In my...

    Started by Joseph‎, 06-20-2006 05:24 AM
    • Replies: 3
    • Views: 7,608
    06-21-2006, 11:00 PM Go to last post
  41. Test to use for series comparison

    I have a silly example to illustrate something that I am looking into, but I don't want to give up what I'm after just yet. So indulge the stupidity...

    Started by ParadiseIsle‎, 06-21-2006 02:17 PM
    • Replies: 0
    • Views: 2,443
    06-21-2006, 02:17 PM Go to last post
  42. Random effects results using LME in R

    Hi. Anyone know how to interpret the Random Effects results below I get from a LME analysis using the R stats package? Thanks...

    Started by mishery‎, 06-21-2006 10:54 AM
    • Replies: 0
    • Views: 3,521
    06-21-2006, 10:54 AM Go to last post
  43. Question Non-parametric analysis question - please help!

    Hi. Cool forum btw - just what I need! :) I have agonised over this for while. I have two lots of questionnaire data - for one study this is...

    Started by alias grace‎, 06-08-2006 07:07 AM
    • Replies: 9
    • Views: 3,416
    06-19-2006, 10:07 PM Go to last post
  44. Regression question

    If I have two IV's, A and B and a third IV, C which is the sum of A and B - in general is fitting C equivalent to fitting A and B? For a set of...

    Started by mishery‎, 06-19-2006 10:48 AM
    • Replies: 0
    • Views: 2,327
    06-19-2006, 10:48 AM Go to last post
  45. Question Analysis of Variance-F Distribution

    The FIRST problem I am having is plugging in the right numbers into the formula. I have an attachment of the problem because I cannot paste directly...

    Started by lovetoreadXYZ‎, 06-14-2006 02:56 PM
    • Replies: 4
    • Views: 3,835
    06-16-2006, 10:07 PM Go to last post
  46. MGF and Maximum Likelihood Estimation - need help!

    Hi all, I'm new to the forums and delighted to have discovered this website! I am currently studying for a Higher Certificate in Statistics and...

    Started by pixels‎, 06-15-2006 03:37 PM
    • Replies: 1
    • Views: 3,191
    06-15-2006, 11:57 PM Go to last post
  47. Red face Basic stats!!!

    Hi there, I need some advice on simple stats which I am taking up again (after ten years!) in the context of a study that involves a test...

    Started by nikoleye‎, 06-10-2006 02:01 PM
    • Replies: 4
    • Views: 3,481
    06-14-2006, 10:56 PM Go to last post
  48. Reliability analysis

    Hi, i have a test with only 5 dichotomous items. the test has been given to 25 people. Its avery easy test with the mean of 4.32 out of 5 and...

    Started by Humphrey‎, 06-14-2006 11:07 AM
    • Replies: 0
    • Views: 4,374
    06-14-2006, 11:07 AM Go to last post
  49. I'm so lost on population variances!!

    Hello, Suppose a company is making a product. They want a maximum variance of .0001 inches. Assume a sample size of 15 products has a standard...

    Started by half-life‎, 06-13-2006 08:55 PM
    • Replies: 0
    • Views: 1,928
    06-13-2006, 08:55 PM Go to last post
  50. Stats dummy needs help!!

    I am wanting to prove an objective that an event happened near 100%. I have a random sample of 60. Total population is 1,000. Any help would...

    Started by stephj37‎, 06-13-2006 03:47 PM
    • Replies: 0
    • Views: 1,976
    06-13-2006, 03:47 PM Go to last post
  51. Hypothesis testing w/ equality of variances F distribution

    For example when we have a equality of variances (with the F DISTRIBUTION), against a 2 sided test, H: O^2=O^2 against that the variances that are...

    Started by Michelle‎, 06-13-2006 03:34 PM
    • Replies: 0
    • Views: 2,713
    06-13-2006, 03:34 PM Go to last post
  52. question about surveys for conservation program?

    Hello, I am running a survey for a marine conservation program an was hoping to get some help on how to analyse the results. I am running a marine...

    Started by awals‎, 06-13-2006 04:56 AM
    • Replies: 0
    • Views: 1,889
    06-13-2006, 04:56 AM Go to last post
  53. p-value help

    Hi there. I need help with a question assigned to me about p-values. The problem is: A company advertises that its fuel additive will improve gas...

    Started by natalie‎, 06-11-2006 10:43 PM
    • Replies: 1
    • Views: 1,784
    06-12-2006, 11:23 PM Go to last post
  54. Regression

    hi people, I have an exam coming in a couple of weeks and I am stuck with this one....: let y=b0+b1x+E a linear regression model. the linear...

    Started by WeeG‎, 06-12-2006 03:39 PM
    • Replies: 0
    • Views: 1,981
    06-12-2006, 03:39 PM Go to last post
  55. Question Interaction Effect Test Methods

    Hie, i would like to test interaction effect for my moderator variable (personality type - in total 9 types) on the independent variables (stressors...

    Started by Nee‎, 06-12-2006 01:15 PM
    • Replies: 0
    • Views: 2,756
    06-12-2006, 01:15 PM Go to last post
  56. Need to clarify something

    I wanted to do a project on ethnicity in the different states of the U.S. Like whether one ethnicity prefers to go towards a certain region more. I...

    Started by xiem‎, 06-11-2006 06:12 AM
    • Replies: 0
    • Views: 1,955
    06-11-2006, 06:12 AM Go to last post
  57. Solve for Z

    Hi all, I cant get my head around how to rearange this formula so as to solve for z. Can someone help please? A set by step would be good not...

    Started by Peter.Spence‎, 06-11-2006 03:03 AM
    • Replies: 0
    • Views: 2,257
    06-11-2006, 03:03 AM Go to last post
  58. factor analysis of single item variables possible?

    Hi everyone, I am extremely rusty in my stats know-how. Is it possible to correctly interpret a factor analysis of variables that are each...

    Started by fbarbie‎, 06-10-2006 11:36 PM
    • Replies: 0
    • Views: 4,270
    06-10-2006, 11:36 PM Go to last post
  59. Question confidence interval

    I have a project that i have to present to the class before our teacher teaches the material, and hopefully someone can help me out. You surveyed...

    Started by Shirlaw‎, 06-05-2006 05:57 PM
    • Replies: 1
    • Views: 2,984
    06-06-2006, 11:02 PM Go to last post
  60. Need help with manova

    Can someone please explain what a manova is and give an example of 2x3 design? Also, would a study comparing anxiety and depression (2 dependent...

    Started by efrantz‎, 06-06-2006 08:39 PM
    • Replies: 0
    • Views: 2,583
    06-06-2006, 08:39 PM Go to last post

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