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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: 196,988
    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: 66,870
    09-30-2005, 09:44 AM Go to last post
  1. 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: 2,240
    08-28-2006, 11:32 AM Go to last post
  2. 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: 2,503
    08-27-2006, 12:26 PM Go to last post
  3. 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: 2,326
    08-27-2006, 12:21 PM Go to last post
  4. 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: 2,671
    08-27-2006, 05:58 AM Go to last post
  5. 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: 2,194
    08-26-2006, 09:07 PM Go to last post
  6. 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: 4,753
    08-25-2006, 07:20 PM Go to last post
  7. 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: 2,850
    08-25-2006, 06:28 PM Go to last post
  8. 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: 2,867
    08-25-2006, 05:23 PM Go to last post
  9. 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: 3,169
    08-25-2006, 03:24 PM Go to last post
  10. 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: 6,185
    08-25-2006, 03:21 PM Go to last post
  11. Question On exploratory research

    Hello, My first thread was not that all successful in terms of replies (probably due to my limited knowledge of statistics and consequently a...

    Started by majojo‎, 08-24-2006 04:51 PM
    • Replies: 2
    • Views: 2,326
    08-25-2006, 01:57 PM Go to last post
  12. Question About Statistical Significance

    Greetings, I am currently working on a project where I analyzed a company's client data and I am currently trying to figure out...

    Started by yunmin‎, 08-24-2006 04:48 PM
    • Replies: 1
    • Views: 2,424
    08-25-2006, 10:43 AM Go to last post
  13. I am lost

    I have taken fairly well to statistics so far, but I have been totally stumped by this most recent addition to my level of confusion: p-values ...

    Started by Glass4‎, 08-24-2006 05:45 PM
    • Replies: 2
    • Views: 2,116
    08-25-2006, 10:33 AM Go to last post
  14. Exclamation Using factor analysis to test hypothesis

    I have 8 variables (different types of reading material): V1, V2, V3, V4, V5, V6, V7 and V8. According to theory variables V1-V5 should represent one...

    Started by igor‎, 08-18-2006 02:06 PM
    • Replies: 1
    • Views: 5,530
    08-24-2006, 09:04 AM Go to last post
  15. how to analyse rank ordering

    Hi, I'm not sure the best way to analyse my data. I'm getting people to arrange a list of terms from most.. to least.. I can calculate the mean...

    Started by FionaM‎, 08-24-2006 01:43 AM
    • Replies: 0
    • Views: 2,119
    08-24-2006, 01:43 AM Go to last post
  16. SD of an average

    I have a statistics question, relevant to an engineering project. A quantity was measured N times, with an average of A and a standard deviation...

    Started by HMM‎, 08-23-2006 08:18 AM
    • Replies: 1
    • Views: 2,850
    08-23-2006, 02:58 PM Go to last post
  17. Thumbs down Moving average

    Hi, I am looking for a way to test de difference between two moving average. I want to know if the moving average at time t is equal or not to the...

    Started by Gilles‎, 08-21-2006 09:54 AM
    • Replies: 0
    • Views: 3,008
    08-21-2006, 09:54 AM Go to last post
  18. power calc with coeff of variation

    Dear all, I am a neuroimager and I measure the levels of different chemicals in the brain. We did a test-retest study on our measures (10 subjects...

    Started by ongurd‎, 08-20-2006 08:56 AM
    • Replies: 2
    • Views: 3,304
    08-20-2006, 09:55 PM Go to last post
  19. Question In desperate need of help

    :confused: Hello everyone! I am in dire need of help with my statistics, about which I know little. Assistance is needed to help me complete a...

    Started by majojo‎, 08-19-2006 10:54 AM
    • Replies: 0
    • Views: 2,641
    08-19-2006, 10:54 AM Go to last post
  20. Can anyone help me with this Spearman test?

    Hi everyone I am doing a Spearman correlation as part of a university project and wondered if anyone can help me with it please? I have to find a...

    Started by ironic_lettuce‎, 08-19-2006 06:44 AM
    • Replies: 0
    • Views: 3,749
    08-19-2006, 06:44 AM Go to last post
  21. Correct statistical test to use

    I'm a stats & SPSS novice, and I'm trying to think through a statistical testing question I have. Part of this involves using SPSS, so I apologize in...

    Started by Tennessee Steel‎, 08-16-2006 05:17 PM
    • Replies: 2
    • Views: 3,526
    08-18-2006, 11:01 PM Go to last post
  22. Lightbulb ANOVA - Main effects and interactions

    I have a question about ANOVA main effects and interactions. If my main effects are not significant, can I go ahead and make any sense out of...

    Started by CBABD‎, 08-15-2006 09:35 PM
    • Replies: 4
    • Views: 3,851
    08-18-2006, 10:58 PM Go to last post
  23. Mann Whitney U Test problem

    Hi! I have worked out Mann Whitney U Tests by hand, and afterwards checked them on internet computer programmes, except that one of them doesn't...

    Started by Thick As Treacle‎, 08-18-2006 02:45 PM
    • Replies: 0
    • Views: 4,242
    08-18-2006, 02:45 PM Go to last post
  24. How to convert ordinal into interval?

    Hi all, i'm a new member here.. I have a problem, right now i'm on my undergraduate thesis, my thesis is about the relation between internal audit...

    Started by smartmushu‎, 08-16-2006 04:29 AM
    • Replies: 4
    • Views: 21,331
    08-18-2006, 02:35 PM Go to last post
  25. please help

    Hi all Can I get some help from you, I am a research student I developed questionnaire to get some information but after I get the results I am...

    Started by almohandes‎, 08-09-2006 07:04 AM
    • Replies: 2
    • Views: 2,475
    08-18-2006, 05:43 AM Go to last post
  26. My brain hurts- confidence intervals

    I have probably been looking at this problem for too long- it is just a sample problem, not part of an assignment, but I am so stuck! I seem to be...

    Started by Glass4‎, 08-14-2006 07:57 PM
    • Replies: 3
    • Views: 2,327
    08-17-2006, 01:35 AM Go to last post
  27. Comparing groups - z-scores

    I have two groups A and B. Each subject has provided scores on a number of tests, and I want to give each subject an overall score based on these...

    Started by Alsvartr‎, 08-16-2006 03:20 AM
    • Replies: 2
    • Views: 7,704
    08-16-2006, 11:59 AM Go to last post
  28. Need help in analysis

    Hi....All stats gurus ....kindly help me with this I have data from 12 patients, and we have measured 5 hemodynamic variables ( Systolic Blood...

    Started by rajmd‎, 08-14-2006 06:23 PM
    • Replies: 3
    • Views: 2,302
    08-16-2006, 11:36 AM Go to last post
  29. Question NASA TLX analysis?!?

    Hi folks -please has anyone got any advice on how to analyse NASA Task Load Index (TLX) data? Some people treat it loosely as interval data and...

    Started by mcgeemr‎, 08-16-2006 10:10 AM
    • Replies: 0
    • Views: 5,502
    08-16-2006, 10:10 AM Go to last post
  30. Chi squared or ANOVA for variances analysis

    Which is a better method for testing of variances? Chi squared or ANOVA?

    Started by leekit‎, 07-21-2006 12:45 AM
    • Replies: 6
    • Views: 3,728
    08-15-2006, 09:54 PM Go to last post
  31. determine sample size using confidence interval?

    Hi all, I've just started learning stats. Need help on some questions that I dont quite really understand just by reading the book. How do I...

    Started by wanye‎, 08-14-2006 04:32 AM
    • Replies: 1
    • Views: 4,388
    08-15-2006, 09:16 PM Go to last post
  32. Shannon-Weaver question - please help me

    Sorry if this is in the wrong place. Is the Shannon-Weaver Diversity Index even a statistical test? I don't know......... I think I need to apply...

    Started by Thick As Treacle‎, 08-15-2006 06:53 PM
    • Replies: 0
    • Views: 2,590
    08-15-2006, 06:53 PM Go to last post
  33. Minimum Sample Size required

    Hi everyone, I was wondering if you can help me track down an answer I should probably already know how to find. Assuming I take 1000 calls in a...

    Started by BeeFL‎, 08-15-2006 02:43 PM
    • Replies: 0
    • Views: 3,432
    08-15-2006, 02:43 PM Go to last post
  34. Question chi-square goodness-of-fit test

    I have a question regarding the chi-square goodness-of-fit test: A manager is reviewing information from his five stores and gets the following...

    Started by redman11‎, 08-14-2006 10:50 AM
    • Replies: 1
    • Views: 2,943
    08-15-2006, 01:52 PM Go to last post
  35. normal distribution help

    A worker earns $15 per hr at a plant and is told that only 2.5% of all workers make a higher wage. If the wage is assumed to be normally distributed...

    Started by wanye‎, 08-14-2006 11:04 AM
    • Replies: 3
    • Views: 2,703
    08-15-2006, 07:56 AM Go to last post
  36. logistic regression

    I am using JMP to do a nominal logistic regression analysis. Even though JMP provides me with an output model, the parameter estimates are all...

    Started by tz800‎, 08-14-2006 02:15 PM
    • Replies: 0
    • Views: 3,005
    08-14-2006, 02:15 PM Go to last post
  37. Central tendancy measure for broadband internet speeds

    I have collected over 120 observations of broadband internet speeds achieved through my service provider. The values range from, 5 kilobits per sec....

    Started by br945‎, 08-14-2006 01:08 PM
    • Replies: 0
    • Views: 3,318
    08-14-2006, 01:08 PM Go to last post
  38. Critical t value with .04 significance level

    The problem I am working on tests a claim with a significance level of .04 and it's a left-tailed test with degrees of freedom at 84. In my...

    Started by sweetsncheese‎, 08-12-2006 12:35 PM
    • Replies: 4
    • Views: 13,098
    08-13-2006, 11:48 PM Go to last post
  39. probability calc

    please ignore previous

    Started by lostinspace‎, 08-13-2006 04:22 PM
    • Replies: 0
    • Views: 2,327
    08-13-2006, 04:22 PM Go to last post
  40. Red face A Simple Survey -- Critique Me!

    Hi everyone! First time poster here! :wave: I'm designing a survey for my small business -- but unfortunately, I know very little about...

    Started by JulieGirl1982‎, 08-13-2006 04:02 PM
    • Replies: 0
    • Views: 1,847
    08-13-2006, 04:02 PM Go to last post
  41. Value-at-Risk of a distribution?

    Hi, I have returns data for 2 assets for a 10 year period. I want to determine the Value-at-Risk for the distribution of this data. I have...

    Started by kirpa_karo@hotmail.com‎, 08-09-2006 04:00 PM
    • Replies: 2
    • Views: 3,173
    08-12-2006, 10:22 AM Go to last post
  42. Z-score for Skewness and Kurtosis

    Hi, I have a sample of data (about a hundred numbers) and I would like to roughly estimate whether they follow a normal distribution or not. From...

    Started by Bruno‎, 08-09-2006 06:48 AM
    • Replies: 3
    • Views: 30,185
    08-10-2006, 11:46 PM Go to last post
  43. optimal blending of 3 models

    I have 3 models that have produced losses based on historical industry-wide mix of business (property) and particular clients mix of business...

    Started by lw6767‎, 08-09-2006 10:08 AM
    • Replies: 0
    • Views: 2,287
    08-09-2006, 10:08 AM Go to last post
  44. Partial point biserial correlation anyone?

    Hi! Is there such a thing as a partial point biserial correlation and if so, is it preferable to use this instead of conducting an ANCOVA when...

    Started by lilithlacuna‎, 08-07-2006 11:29 AM
    • Replies: 0
    • Views: 5,543
    08-07-2006, 11:29 AM Go to last post
  45. Transformation of variables...Need help pls!

    Please could someone tell me if i have the right answer and correct it if need be Q: Suppose X is uniformally distributed on [0,pi), and a new...

    Started by hmm...chocolate..‎, 08-01-2006 04:46 PM
    • Replies: 5
    • Views: 2,978
    08-06-2006, 10:39 PM Go to last post
  46. Question One question about expriment design, please help!

    I am a little confused about nested design and block design. Please see following example, how do you think? It is a block design or nested? Six...

    Started by yingxie‎, 08-06-2006 03:44 PM
    • Replies: 0
    • Views: 1,932
    08-06-2006, 03:44 PM Go to last post
  47. Probit Analysis

    Hi everybody! I am new in your forum and I have a question for you. I hope you will be able to help me solve my problem. I am trying to estimate...

    Started by kefth‎, 07-29-2006 12:31 PM
    • Replies: 1
    • Views: 3,233
    08-06-2006, 01:08 PM Go to last post
  48. Tests for secular trend...am I on the right track?

    Hi- This is not homework, but a project rather for both my work and graduate program. I collected data from a large outpatient clinic in my area...

    Started by rocknroll_ghost‎, 07-28-2006 10:26 AM
    • Replies: 1
    • Views: 3,387
    08-06-2006, 12:50 PM Go to last post
  49. Unhappy Parametric Analysis help!

    Hey there have a problem question: I'm producing 2 types of jackets short and long. 2 types of work done on them, cutting & sewing. Cutting...

    Started by fatjoe‎, 08-06-2006 01:50 AM
    • Replies: 0
    • Views: 1,886
    08-06-2006, 01:50 AM Go to last post
  50. Statistics for prescriptions...

    Ok... I am working for a National Wildlife Refuge in Arkansas and am needing some help with some statistical work. I have an equation out of a...

    Started by jccarter1‎, 08-02-2006 09:53 AM
    • Replies: 1
    • Views: 1,704
    08-02-2006, 10:37 PM Go to last post
  51. Assuming Normal distribution

    I have some data, and i need to assume that its is distributed both with a normal and student-t distribution. How do I do that? thanks

    Started by kirpa_karo@hotmail.com‎, 07-31-2006 09:40 AM
    • Replies: 1
    • Views: 2,424
    08-02-2006, 10:29 PM Go to last post
  52. Chi square test procedure in SAS

    Hi does anybody know the appropiate proc for a chi square test in SAS program. Would it be possible to include blocks in the model statement? thanks

    Started by ron‎, 07-30-2006 09:45 PM
    • Replies: 0
    • Views: 2,251
    07-30-2006, 09:45 PM Go to last post
  53. binary spatial data

    Hi, Just working on an environmental project about vegetation mapping. I've got a regular grid of points with percentage of plants for each...

    Started by sartorius‎, 07-29-2006 10:46 AM
    • Replies: 0
    • Views: 2,854
    07-29-2006, 10:46 AM Go to last post
  54. ANOVA and sig. question

    I have a question about ANOVA and statistical significance. I have a 18 question Likert style survey, with about 400 replies. I am analysing...

    Started by Billyvic‎, 07-22-2006 06:15 PM
    • Replies: 3
    • Views: 3,126
    07-28-2006, 07:15 AM Go to last post
  55. Question t test or ANOVA or both???

    Hey Everyone, I'm a Newby who has just joined this forum and already I have a question for you all. I'm wondering which analysis to conduct......

    Started by Celebrate the Nerd!!‎, 07-09-2006 08:34 PM
    • Replies: 4
    • Views: 2,513
    07-28-2006, 07:09 AM Go to last post
  56. 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: 2,679
    07-28-2006, 04:58 AM Go to last post
  57. 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: 3,169
    07-26-2006, 02:27 PM Go to last post
  58. 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: 2,570
    07-26-2006, 01:14 AM Go to last post
  59. 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: 6,734
    07-24-2006, 07:00 AM Go to last post
  60. 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: 2,730
    07-23-2006, 01:27 AM Go to last post

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