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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: 66,710
    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: 196,686
    07-16-2014, 11:01 AM Go to last post
  1. Mediated Regression Analysis

    Hi everyone, First time posting on here. Greetings from Edinburgh. Would be grateful if someone could explain what a mediated regression with an...

    Started by Beachdave‎, 08-24-2006 06:22 AM
    • Replies: 2
    • Views: 6,165
    08-25-2006, 03:21 PM Go to last post
  2. analysing nominal data

    hi, does anybody have any ideas how to analyse nominal data, which is mixed ie. betwee groups and repeated measures? thanks

    Started by johnboy‎, 08-25-2006 03:24 PM
    • Replies: 0
    • Views: 3,140
    08-25-2006, 03:24 PM Go to last post
  3. symbols symbols symbols

    I am in my second stats class and have found that this professor uses different symbols than my previous professor. Example - for the alternative...

    Started by kerber‎, 08-25-2006 05:23 PM
    • Replies: 0
    • Views: 2,848
    08-25-2006, 05:23 PM Go to last post
  4. Sample independence

    I have a simple random sample study design in which I randomly selected 1X1 mile sections and around these sections I randomly placed 3 points. At...

    Started by Jim Tilman‎, 08-25-2006 06:28 PM
    • Replies: 0
    • Views: 2,830
    08-25-2006, 06:28 PM Go to last post
  5. Likert and t-test

    Newbie here... I administered 2 surveys, pre and post event using a 1-5 Likert-type scale. I am using the t-Test for correlated measures to...

    Started by LSM‎, 08-20-2006 09:52 AM
    • Replies: 3
    • Views: 4,730
    08-25-2006, 07:20 PM Go to last post
  6. Red face I need simple help for a documentary.

    Hi, I've search a long time for this place, sure hope I can find some help. I'm doing a feature documentary where three concrete wall samples...

    Started by snowstorm‎, 08-26-2006 09:07 PM
    • Replies: 0
    • Views: 2,174
    08-26-2006, 09:07 PM Go to last post
  7. Question T-test or Chi square

    Dear Anyone I want to compare two variables with continuous scores (originating from summated likert scales) between two categories. Should I...

    Started by majojo‎, 08-27-2006 04:31 AM
    • Replies: 2
    • Views: 2,652
    08-27-2006, 05:58 AM Go to last post
  8. help please

    :confused: i've just started studing statistics and i want to use the chebychev's therorm, however i'm not sure how can i find the value of the...

    Started by aLwEjDaN‎, 08-26-2006 04:09 PM
    • Replies: 1
    • Views: 2,312
    08-27-2006, 12:21 PM Go to last post
  9. writing up output into paragraphs

    hi, i have a lot of output from chi square tests and wilcoxon matched pairs. does anybody have any advice how best to write it up - into...

    Started by johnboy‎, 08-27-2006 04:35 AM
    • Replies: 1
    • Views: 2,499
    08-27-2006, 12:26 PM Go to last post
  10. Web Site Page Visit Stats (Relative Popularity)

    I've started to create a statistical analysis of relative popularity for visits to the articles on a web site. I'm not a statistician, but have...

    Started by Greg‎, 08-28-2006 11:32 AM
    • Replies: 0
    • Views: 2,224
    08-28-2006, 11:32 AM Go to last post
  11. Comparing PATH coefficients

    I am using PATH analysis to examine aggressive behaviour. I have run two separate PATH models with the same participants. Please note these models...

    Started by jeb‎, 08-28-2006 11:42 AM
    • Replies: 0
    • Views: 4,502
    08-28-2006, 11:42 AM Go to last post
  12. parametric test??? what test?

    hi im doing a study to see whether childrens vocabulary develops quicker when children are cared for at hom or in day care. i would like to get 50...

    Started by chelleyy‎, 08-28-2006 08:08 AM
    • Replies: 1
    • Views: 3,159
    08-29-2006, 03:09 PM Go to last post
  13. Help pleaseee:)

    Okay, so I'm horrible at math, and am having the hardest time with this stats problem, if anyone could help, I would so appreciate it. Pollsters...

    Started by Graceisgoen1285‎, 08-29-2006 09:17 PM
    • Replies: 3
    • Views: 6,981
    08-29-2006, 10:03 PM Go to last post
  14. type I error - non parametric stats

    i have run multiple non parametric stats to analyse my data. i read that you cannot make a type I error because the data is not normally distributed,...

    Started by johnboy‎, 08-30-2006 06:37 AM
    • Replies: 1
    • Views: 7,632
    08-30-2006, 08:29 AM Go to last post
  15. Stuck trying to develop test statistic

    Hi, I am stuck trying to develop a test stastic for Ho: 2*Mu1 = Mu2 vs. 2*Mu1 not=Mu2 assuming variances known I think some modification has to...

    Started by deon0808‎, 08-30-2006 07:24 PM
    • Replies: 3
    • Views: 2,616
    08-31-2006, 08:26 AM Go to last post
  16. how do you know if a relationship really exists?

    So i had a problem where I was supposed to calculate a correlation coefficient for some data using the definitional formula and then interpret the...

    Started by Duncan‎, 08-30-2006 12:17 PM
    • Replies: 4
    • Views: 3,157
    08-31-2006, 10:20 AM Go to last post
  17. Multidimensional Scaling

    Does anyone have any esperience with multidimensional scaling with SPSS?

    Started by mfhund‎, 08-24-2006 10:19 AM
    • Replies: 1
    • Views: 2,959
    08-31-2006, 10:43 AM Go to last post
  18. Finding the Reduced Form Equations

    Hey this is my first post here. I'm doing a regress with 5 equations and 5 endogenous vairables plus one unique exogenous variable to each equation....

    Started by mrgold‎, 08-31-2006 11:34 PM
    • Replies: 0
    • Views: 3,936
    08-31-2006, 11:34 PM Go to last post
  19. Please help!

    Can someone help me to answer those questions: 1 - Assume X + Y are independent standard exponentially distributed random variable. Derive the...

    Started by Robert55‎, 09-01-2006 08:38 AM
    • Replies: 0
    • Views: 1,980
    09-01-2006, 08:38 AM Go to last post
  20. Time Series, exponential smoothing--I need help!

    Seems a really simple problem but it's bugging me. I'm using the exponential smmothing formula: NthForecast=k*(N-1)thY + (1-k)(N-1)thForecast,...

    Started by naivesincerity‎, 09-01-2006 09:58 AM
    • Replies: 0
    • Views: 2,765
    09-01-2006, 09:58 AM Go to last post
  21. choosing the right non-parametric test

    Hi there, I am trying to analyze some data and am having trouble trying to figure out what to do. The data is a shrub/elk browse study. The data I...

    Started by japurd04‎, 08-31-2006 10:18 AM
    • Replies: 2
    • Views: 2,560
    09-01-2006, 10:25 AM Go to last post
  22. Degrees of freedom

    Hi everyone, Can somebody please explain the concept of degrees of freedom in depth but made simple Thanks

    Started by ron‎, 08-27-2006 05:42 PM
    • Replies: 5
    • Views: 4,734
    09-02-2006, 08:24 AM Go to last post
  23. Smile Joint CDF's and pdf problem

    I am trying to solve part of a question whicg goes as: Q: Suppose X and Y are two continuous random variables whose joint density function is ...

    Started by hmm...chocolate..‎, 08-11-2006 05:00 PM
    • Replies: 7
    • Views: 8,329
    09-02-2006, 12:18 PM Go to last post
  24. 2x2 Repeated Measures ANOVA

    Hi Everyone! I am working on a 2x2 repeated measures ANOVA and I am having trouble finding much information about it. Basically I taught the same...

    Started by im4avs‎, 08-23-2006 02:14 PM
    • Replies: 3
    • Views: 7,350
    09-03-2006, 07:11 AM Go to last post
  25. p-value determines rejection of null hypothesis?

    Is it true that the larger the p-value, the more likely one is to reject the null hypothesis?

    Started by wanye‎, 09-03-2006 03:38 AM
    • Replies: 1
    • Views: 5,763
    09-03-2006, 07:45 AM Go to last post
  26. Maximum Likelihood Calculus Problems

    Hi all, this is my first post here, looks like a great place! I hope to use this board throughout my current semester as it is going to be a rough...

    Started by mcstl2525‎, 09-03-2006 01:48 PM
    • Replies: 0
    • Views: 2,476
    09-03-2006, 01:48 PM Go to last post
  27. Unhappy Very stuck with simple problem.

    Hi everyone, :wave: I am at the end of my tether with trying to sort out the statistics for my report. It's simple stuff but I am hopeless with...

    Started by Stuck‎, 09-04-2006 07:32 AM
    • Replies: 10
    • Views: 3,451
    09-04-2006, 09:48 AM Go to last post
  28. Question Sample Sizes

    Oks. I have stressed a bit and am going to have another go. I have concluded that however I divide the data I have, I am going to end up with...

    Started by Stuck‎, 09-04-2006 10:13 AM
    • Replies: 3
    • Views: 3,750
    09-04-2006, 10:49 AM Go to last post
  29. inferences from two samples

    Anyone that might be able to help me out solving a few problems dealing with this topic? If you have AIM my AIM name is BigNiner19. Let me know,...

    Started by BigNiner19‎, 09-04-2006 11:05 AM
    • Replies: 2
    • Views: 3,021
    09-04-2006, 12:36 PM Go to last post
  30. logistic regression help

    I have estimated a logistic regression using a sample of 50:50 of the event and non-event. I know in the population that the actual probability of...

    Started by nwcmrc‎, 09-04-2006 04:12 PM
    • Replies: 0
    • Views: 1,855
    09-04-2006, 04:12 PM Go to last post
  31. Question Need help with quiz

    10.The reason the t statistic has more variability than the Z statistic is that from sample to sample a.the sample mean becomes smaller and the...

    Started by csiemer‎, 09-04-2006 08:20 PM
    • Replies: 2
    • Views: 2,624
    09-04-2006, 09:00 PM Go to last post
  32. Exclamation logistic regression

    If I estimate a logistic regression using a sample of 50:50 for my event and non-event. What adjustments do I make when predicting with the model if...

    Started by nwcmrc‎, 09-05-2006 04:01 AM
    • Replies: 0
    • Views: 1,719
    09-05-2006, 04:01 AM Go to last post
  33. True to assume equal variance when testing difference between the means???

    hi all, In testing for the difference between the means, is it true that we assume that each of the populations is normally distributed with equal...

    Started by wanye‎, 09-05-2006 06:10 AM
    • Replies: 1
    • Views: 6,986
    09-05-2006, 08:34 AM Go to last post
  34. homework issues

    I have a question on homework as follows: In a normally distributed population that is very large, mu was found to be 100 and sigma = 20. If a...

    Started by darkmattress‎, 09-05-2006 04:45 PM
    • Replies: 1
    • Views: 1,822
    09-05-2006, 07:04 PM Go to last post
  35. Interesting Standard Deviation Query

    Hi, My boss just asked me if we could use standard deviation for the following: A water treatment plant is recieving flow (F), which is...

    Started by nitinv‎, 08-31-2006 11:08 AM
    • Replies: 2
    • Views: 2,053
    09-06-2006, 04:47 AM Go to last post
  36. Logistic regression and collinearity

    Hi everybody! I am working on a logistic regression model using spss. After performing a linear regression in order to use the collinearity...

    Started by mtranos‎, 09-06-2006 06:56 AM
    • Replies: 0
    • Views: 4,839
    09-06-2006, 06:56 AM Go to last post
  37. Struggling with written statistics question.

    Hello. I'm currently revising for a statistics re-sit examination and when going over past papers have found one question commonly appears. Both...

    Started by Frogs‎, 09-05-2006 11:56 AM
    • Replies: 1
    • Views: 2,358
    09-06-2006, 11:07 AM Go to last post
  38. Question Rank Comparisons

    Hi, First, thanks in advance for taking the time to look at this. Ok, here goes. I have an interview that lists 12 reasons for why respondents...

    Started by MsfStl‎, 09-06-2006 02:26 PM
    • Replies: 2
    • Views: 1,741
    09-06-2006, 03:10 PM Go to last post
  39. ordinal independent variables in ANOVA

    We have some data from a 2x5 factorial experiment which, when graphed, looks like an obvious interaction. The ANOVA, however, says the interaction...

    Started by CullingJ‎, 09-07-2006 06:07 AM
    • Replies: 1
    • Views: 4,975
    09-07-2006, 08:35 AM Go to last post
  40. Z and p value problem

    hi im obviusly new on this forum :) and ask for Your help im having results of research like this 4 groups (with no paracetamol, with 50,...

    Started by kikson‎, 09-07-2006 04:03 AM
    • Replies: 1
    • Views: 1,534
    09-07-2006, 08:39 AM Go to last post
  41. Hi research student needs urgent help with simple problem

    Hi am writing my honours dissertation for sociology and need desperate help calculating a simple problem. Still, I don't even know if it can be done....

    Started by sublunar‎, 09-07-2006 05:15 AM
    • Replies: 7
    • Views: 3,073
    09-08-2006, 10:12 PM Go to last post
  42. mean of a fluctuating time series - what is the uncertainy?

    Hello. I very much appreciate your attention to my problem. I have lists of data generated by my computer simulations collected over simulation...

    Started by ata5d‎, 09-09-2006 09:37 AM
    • Replies: 4
    • Views: 2,574
    09-09-2006, 02:21 PM Go to last post
  43. Question Type I and II, HO and H1

    I am committing to memory the definitions of the Type I and II error rates, but my brain is having difficulty when looking at a null and alternative...

    Started by kerber‎, 09-09-2006 10:02 PM
    • Replies: 2
    • Views: 8,764
    09-10-2006, 08:57 AM Go to last post
  44. Need help with a statistics assignment

    Hey, I need help with a statistics assignment,its 2 parts,ive done the first part on my own however as I am unable to do the second one and ask...

    Started by sal87‎, 09-10-2006 12:07 AM
    • Replies: 2
    • Views: 2,752
    09-10-2006, 05:40 PM Go to last post
  45. Question How to use a random sampling table

    Hi, How do you use a random sampling table :confused: Thank You:)

    Started by jena2007‎, 09-07-2006 11:38 PM
    • Replies: 2
    • Views: 3,933
    09-10-2006, 09:42 PM Go to last post
  46. significant differences between 2 groups

    Hi, I have been trying to find out how I can most significantly analyse the differences between two groups in my survey (like male and female) on...

    Started by Leilsa‎, 09-10-2006 08:08 PM
    • Replies: 1
    • Views: 2,702
    09-10-2006, 10:17 PM Go to last post
  47. Question Construct a 95% confidence interval ???

    Hi:) , I'm sort of confused with this statistics problem: As part of a recent study conducted in France investigating the effectiveness of...

    Started by jena2007‎, 09-10-2006 09:50 PM
    • Replies: 6
    • Views: 6,176
    09-10-2006, 11:46 PM Go to last post
  48. Exclamation Help, Please

    I am using the Least Regression Squares Method and for some reason I keep calculating the y-intercept incorrectly. Is it not the mean of Y - the...

    Started by pagemaster‎, 09-11-2006 04:00 PM
    • Replies: 1
    • Views: 2,330
    09-11-2006, 04:07 PM Go to last post
  49. ANOVA results and confidence intervals

    Hallo can someone help me with this problem, please? I have done a univariate 2 factor ANOVA with spss. The problem is that the 95% confidence...

    Started by sirhoppel‎, 09-11-2006 11:05 AM
    • Replies: 2
    • Views: 8,097
    09-11-2006, 08:53 PM Go to last post
  50. Moved: need help with Spss

    Started by wanye‎, 12-25-2006 09:46 PM
    • Replies: -
    • Views: -
    09-12-2006, 07:39 AM Go to last post
  51. Help with box plots please!!!

    I really need help with this problem. Cassette versus Cd Sales] Has the increasing popularity of the compact disc (CD) affected sales of cassette...

    Started by xjinax8807‎, 09-12-2006 10:47 PM
    • Replies: 2
    • Views: 4,531
    09-12-2006, 11:20 PM Go to last post
  52. Ogives help! tx~~

    Okay I've also been very confused on ogives ..the cumulative average concept. Is there a site that gives tutorials on them? b/c I cannot seem to...

    Started by xjinax8807‎, 09-12-2006 11:26 PM
    • Replies: 1
    • Views: 3,070
    09-12-2006, 11:30 PM Go to last post
  53. Question Help me out: Computing SE CV SED LSD

    Dear All, In calculating standard error of mean (SE) and coefficient of variation (CV) for summary table of means exported to excel from SAS anova...

    Started by analyst‎, 09-13-2006 08:19 AM
    • Replies: 0
    • Views: 9,597
    09-13-2006, 08:19 AM Go to last post
  54. Thumbs down Z-Score?

    Hi, I'm having a problem figurung out what this question is asking: "Find the number Z such that the proportion of observations that are less...

    Started by RedFred2089‎, 09-13-2006 03:53 PM
    • Replies: 2
    • Views: 7,410
    09-13-2006, 07:59 PM Go to last post
  55. Question Confused

    I'm not sure if you can help me or not but I thought it would be worth a try. I am totally confused on what my proffessor gave me. He has tried...

    Started by princess‎, 09-13-2006 05:32 PM
    • Replies: 2
    • Views: 2,284
    09-13-2006, 10:31 PM Go to last post
  56. Help with Confidence Interval, please

    Hi, I'm so rusty at statistics (took it a year ago) I've got the basic formula down, but this particular problem is hitting me in a blind spot. ...

    Started by HistoryStudentGWU‎, 09-13-2006 09:28 PM
    • Replies: 3
    • Views: 2,412
    09-14-2006, 06:25 AM Go to last post
  57. Biodiversity and Population Density Correlations

    Hello there Consultants, :wave: I am doing a comparison between two data sets I have collected from two different habitats... I want to show that...

    Started by japo‎, 09-14-2006 10:20 AM
    • Replies: 0
    • Views: 4,243
    09-14-2006, 10:20 AM Go to last post
  58. Frequencies

    Can some please explain to me the formula to frequency. I am totaly lost and professor is going to quiz us tomorrow.

    Started by n2c2mm2nt‎, 09-14-2006 06:25 PM
    • Replies: 6
    • Views: 2,900
    09-14-2006, 07:05 PM Go to last post
  59. Decision analysis

    Equipment Favorbale Unfavorable Sub 100 300000 -200000 Oiler J 250000 -100000 Texan 75000 ...

    Started by Pipster‎, 09-14-2006 07:12 PM
    • Replies: 1
    • Views: 3,702
    09-14-2006, 09:09 PM Go to last post
  60. Moving Targets?

    Ok, here is my problem. I have two categories that I think are apples and oranges. The first deals with Dollars Delinquent percentage based on...

    Started by Mesmer‎, 09-14-2006 11:22 PM
    • Replies: 0
    • Views: 2,842
    09-14-2006, 11:22 PM Go to last post

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