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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: 197,119
    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: 66,934
    09-30-2005, 09:44 AM Go to last post
  1. Seeing patterns/causality in randomness. (cancer clusters, etc)

    Let's say a particular disease is totally random. There is no known cause. There will be random variation in the proportion of people who have the...

    Started by CrunchAndSee‎, 01-11-2016 12:25 PM
    • Replies: 5
    • Views: 1,899
    01-12-2016, 12:52 PM Go to last post
  2. Poor people die sooner

    Organizations & people that defraud others are thereby shortening the lives of these people and doing them more than just financial harm. The con...

    Started by Outlier‎, 01-09-2016 08:20 PM
    • Replies: 3
    • Views: 1,736
    01-12-2016, 12:50 PM Go to last post
  3. How to report simple effects analysis (SPSS)

    Hi, I've been told that we can conduct simple effects analysis following interactions. Using SPSS, this requires writing syntax codes. I read...

    Started by yinsstats‎, 01-12-2016 04:15 AM
    • Replies: 0
    • Views: 1,756
    01-12-2016, 04:15 AM Go to last post
  4. As part of a public health survey, a random sample of college students were asked abo

    The following results were obtained: Gender of Student Never < 3 Drinks 3+ Drinks per Week per Week Men 116 ...

    Started by missremeber‎, 01-11-2016 09:56 PM
    • Replies: 1
    • Views: 2,069
    01-11-2016, 10:06 PM Go to last post
  5. One out of four data sets not normally distributed

    Dear all, I was wondering if someone could possibly help me with something. Is it possible to use a normal ANOVA if I have one out of four data...

    Started by tro2‎, 01-09-2016 05:31 PM
    • Replies: 5
    • Views: 2,039
    01-11-2016, 01:41 PM Go to last post
  6. More comlex regression models: Terminology and Software

    Hi, I would like to couple two regression models and solve them simultaneously. That means: I have one regression equation: \hat Y_i = \hat...

    Started by mmercker‎, 01-11-2016 01:38 PM
    regression analysis
    • Replies: 0
    • Views: 1,016
    01-11-2016, 01:38 PM Go to last post
  7. Please help me find the formula for this

    Hi everyone!Can you please help me find he formula for this. I'm sorry but I don't know. Five light bulbs burned out after lasting for 867, 849,...

    Started by leanne0120‎, 01-10-2016 07:48 PM
    .statistics course, homework, statistics assignment, statistics class, statistics problems
    • Replies: 3
    • Views: 1,177
    01-11-2016, 03:36 AM Go to last post
  8. General linear mixed model - 5 years

    Dear all, every help is highly appreciated! I have a data set that looks like the one I attached to this post. I have five independent variables...

    Started by MaxLenk‎, 01-10-2016 07:29 AM
    • Replies: 2
    • Views: 1,609
    01-10-2016, 12:56 PM Go to last post
  9. Interpretation of statistical analysis result

    What does F(3,36)=16.1; p<0.05 mean?

    Started by pothovranto‎, 01-09-2016 04:05 AM
    • Replies: 1
    • Views: 1,291
    01-09-2016, 07:51 AM Go to last post
  10. Exclamation Redesigning a questionnaire - use Primary Component Analysis (PCA)?

    A quick background: I am trying to evaluate a questionnaire used to assess patients. It is used around the world to establish whether a patients...

    Started by j_cocker‎, 01-09-2016 04:56 AM
    • Replies: 1
    • Views: 1,048
    01-09-2016, 06:16 AM Go to last post
  11. Mode of a Uniform Distribution

    Hi Folks, I searched for this (google, wiki, Talk Stats) and didn't find the response (which doesn't mean it's not there somewhere but...). ...

    Started by bustedkrutch‎, 01-08-2016 03:25 PM
    mode, uniform distribution
    • Replies: 0
    • Views: 1,299
    01-08-2016, 03:25 PM Go to last post
  12. Expected value

    Hi! I'm having problem with the given task and I'd be really thankful for any hints how could I approach this. Point a) is, I think, relatively easy...

    Started by madziarozaur‎, 01-07-2016 05:50 PM
    • Replies: 4
    • Views: 1,359
    01-08-2016, 01:43 PM Go to last post
  13. Calculation of Sample Size for one-way ANOVA

    Hello, I have problem of calculating sample size for one-way ANOVA. My settings is the following: Population size = 100 Controlled group = 1...

    Started by Rucci‎, 01-08-2016 05:27 AM
    anova, sample size
    • Replies: 0
    • Views: 1,310
    01-08-2016, 05:27 AM Go to last post
  14. Predicting within an interval

    Hi guys, I wont go into the context of my problem, I'll explain in general terms. I have a sample of ranges (i.e. two variables, a lower and upper...

    Started by deanl1‎, 01-08-2016 04:52 AM
    • Replies: 0
    • Views: 898
    01-08-2016, 04:52 AM Go to last post
  15. Is percentage data considered 'proportional'?

    So imagine a study where I want to find out if males and females differ in the amount of time spent looking at certain parts of an advertisement...

    Started by Toivo‎, 01-08-2016 04:15 AM
    • Replies: 0
    • Views: 800
    01-08-2016, 04:15 AM Go to last post
  16. Difference of measures when classified and unclassified data

    Hi all, I have 100 values and I have found some values when the data are ungrouped and when they are seperated into 8 classes. My results are the...

    Started by petros20‎, 01-07-2016 08:12 AM
    • Replies: 4
    • Views: 2,070
    01-08-2016, 03:23 AM Go to last post
  17. Determining minimum control group size for purposes of verifying lift

    I have the following scenario: - We want to send out an email blast to existing members to promote an upsell. - We are quite positive the email...

    Started by xandalorian‎, 01-08-2016 12:01 AM
    control, experiment design
    • Replies: 0
    • Views: 900
    01-08-2016, 12:01 AM Go to last post
  18. Linear Regression Question

    Hello Everyone. So I'm doing a stats assignment, and I'm having difficulty answering one of the questions. Here's the background question. A study...

    Started by ArchAngel‎, 01-07-2016 07:48 AM
    • Replies: 8
    • Views: 1,483
    01-07-2016, 06:19 PM Go to last post
  19. Right method?

    I have an ordinal scale with 4 different viable answers for each questions. The structure follows a Likert scale. I want to see if age plays a...

    Started by Relax2‎, 01-06-2016 09:13 AM
    • Replies: 4
    • Views: 1,866
    01-07-2016, 05:23 AM Go to last post
  20. Please help! Should i use a Mixed ANOVA?

    I am struggling on which type of ANOVA to use for my work, I will provide as many details below about the study design, at the moment I am thinking...

    Started by TruroJP‎, 01-04-2016 01:36 PM
    analysis, anova, design, mixed anova, mixed design
    • Replies: 2
    • Views: 1,576
    01-06-2016, 07:49 AM Go to last post
  21. Please help - understanding who misses appointments

    Hello everyone, I would really appreciate any help you can offer - it's been a little while since I've done any stats courses and I'm feeling a...

    Started by lucy123‎, 01-05-2016 08:25 AM
    • Replies: 2
    • Views: 1,298
    01-06-2016, 02:02 AM Go to last post
  22. Calculate mean

    If I have the following data time ( hours) 0.2,2,7 distance (km) 0.02,0.1,0.9 To calculate the least squares estimate of the mean do I just...

    Started by calypso‎, 01-03-2016 09:49 AM
    • Replies: 6
    • Views: 2,557
    01-05-2016, 04:32 PM Go to last post
  23. Question help needed please - creating sub categories within a category

    Hi All, I'm new at SPSS. Currently I'm doing a homework and I have a large set of data. Two of the categories I have is ethnic groups and...

    Started by gokcey82‎, 01-05-2016 03:31 PM
    categories, spss, sub-categories
    • Replies: 0
    • Views: 972
    01-05-2016, 03:31 PM Go to last post
  24. Determining Sample Size

    Hello, I am trying to figure out how to determine a sample size for a real life problem and my business. I am selling motor-bikes and every...

    Started by Kyriakos‎, 01-05-2016 03:44 AM
    • Replies: 1
    • Views: 810
    01-05-2016, 04:11 AM Go to last post
  25. Question new meanings of parameters after log transform of regression model

    To produce a better fit, log(Y) is used as the response variable in a new transform model. When you get the antilog of this new equation, what do...

    Started by Skye‎, 01-04-2016 09:49 AM
    • Replies: 7
    • Views: 2,034
    01-04-2016, 04:18 PM Go to last post
  26. is it correct to have Second order factors for dependent , Independent and mediator v

    0 down vote favorite I am developing a Model that includes second order for dependent , mediator and independent constructs. is it correct to have...

    Started by goldrose‎, 01-03-2016 01:29 PM
    • Replies: 2
    • Views: 1,712
    01-04-2016, 12:43 PM Go to last post
  27. Multivariate Statistic: Linear or unimodal relationship?

    Hi, if I want to analyze a multivariate dataset, I have to choose between methods assuming a linear relationship between the outcome and underlying...

    Started by mmercker‎, 01-04-2016 09:51 AM
    correspondence analysis, pca analysis, rda, relationships
    • Replies: 0
    • Views: 1,359
    01-04-2016, 09:51 AM Go to last post
  28. Hypothesis test problem ?

    Hi all, I want to solve the following problem. But I don't have understand exactly what I have to do. Could you help me please ? A news feed is...

    Started by petros20‎, 01-04-2016 05:18 AM
    hypothesis test
    • Replies: 0
    • Views: 1,063
    01-04-2016, 05:18 AM Go to last post
  29. Calculating the amount of underestimation

    Coverage rate for a parameter is 91.2%, and the nominal coverage rate is 95%. If the confidence interval is based on asymptotic standard normal, then...

    Started by Cynderella‎, 01-01-2016 11:11 PM
    confidence interval, normal-distribution, sampling, statistics
    • Replies: 0
    • Views: 955
    01-01-2016, 11:11 PM Go to last post
  30. Simple Algebraic Calculation about underestimation

    In a findings, it is found that the non-coverage rate for the second-level intercept variance is 8.9%, and the non-coverage rate for the second-level...

    Started by Cynderella‎, 12-31-2015 02:07 PM
    mixed model, sampling, variance components
    • Replies: 2
    • Views: 1,104
    01-01-2016, 03:51 AM Go to last post
  31. "You never see a Ferrari rust like a Honda"

    When someone says "You never see a Ferrari rust like a Honda", the logical flaw is that a Honda is typically used as daily drivers thru severe...

    Started by CrunchAndSee‎, 12-03-2015 03:59 PM
    • Replies: 8
    • Views: 2,662
    12-31-2015, 03:00 PM Go to last post
  32. Frequentist Coverage Language

    I get: Ө-hat +/- (1.96*SE(Ө-hat)) has at least 95% coverage, if Bia^2/Var(Ө-hat) --> 0 as n --> infinity, but I saw it written this...

    Started by hlsmith‎, 12-31-2015 11:21 AM
    • Replies: 1
    • Views: 961
    12-31-2015, 11:55 AM Go to last post
  33. Is Snopes wrong? (Statistical Significance)

    In a Snopes article that addressed the Australian gun buyback program (Australian Guns) they make a claim that doesn't seem quite right to me: ...

    Started by ElZagna‎, 12-27-2015 10:57 PM
    • Replies: 4
    • Views: 1,594
    12-30-2015, 03:22 PM Go to last post
  34. ANCOVA versus regression: Independence of the covariate and treatment effect.

    Hi, if you read about the assumptions of an ANCOVA, you find the following assumption: "independence of the covariate and treatment effect". ...

    Started by mmercker‎, 12-30-2015 02:22 AM
    ancova, regression analysis
    • Replies: 1
    • Views: 1,342
    12-30-2015, 12:13 PM Go to last post
  35. TIL min/max scaling

    Probably an elementary thing to many here but I learned about min max scaling to make everything in a vector between 0-1. This is great for scaling...

    Started by trinker‎, 12-29-2015 04:45 PM
    • Replies: 1
    • Views: 911
    12-30-2015, 08:33 AM Go to last post
  36. Have I done it correctly? (Fligner-Kelleen test + ANOVA)

    I need to verify if I have done everything correct, and especially one thing that I’m unsure of (end of this text). I have done the calculations in R...

    Started by Relax2‎, 12-29-2015 09:53 AM
    • Replies: 0
    • Views: 999
    12-29-2015, 09:53 AM Go to last post
  37. Which test to use here?

    Hi all, I am having some difficulty deciding which statistical test is most appropriate for this research. We are evaluating the...

    Started by Owsley‎, 12-28-2015 04:21 AM
    • Replies: 4
    • Views: 2,132
    12-29-2015, 09:09 AM Go to last post
  38. Question ANOVA? I need support/help with SPSS and Stats

    Hi, I have a group ( n = 8 ), whom performed 2 different exercise protocols pre/post a vertical jump test, these were (1) single set of squats,...

    Started by AJW1995‎, 12-28-2015 10:49 AM
    • Replies: 1
    • Views: 998
    12-28-2015, 12:10 PM Go to last post
  39. hypothesis tests

    i wanted to know if hypothesis such as: H0: P(X belongs to V) = 0 and H1: P(X belongs to V) > 0, can be used using typical hypothesis testing...

    Started by familyoffour‎, 12-28-2015 12:10 PM
    hypothesis
    • Replies: 0
    • Views: 1,354
    12-28-2015, 12:10 PM Go to last post
  40. Multivariate probability distributions

    Hi all! I could not solve this question of my homework. It is really hard to do that for my level. I solved other 4 questions but it is...

    Started by erdmp‎, 12-28-2015 10:12 AM
    • Replies: 1
    • Views: 1,227
    12-28-2015, 10:40 AM Go to last post
  41. Likert type question.

    Hello everyone. I had a question with regards to Analysing a likert type questionnaire. I think I have probably done everything wrong though and...

    Started by snerf‎, 12-22-2015 12:23 PM
    • Replies: 2
    • Views: 1,651
    12-28-2015, 03:56 AM Go to last post
  42. Annotation of bootstrapping

    Hi all, I've been asked by reviewers to make the methods section of a paper more formal. The method in short is bootstrapping a probability...

    Started by Andorin‎, 12-27-2015 04:44 PM
    • Replies: 2
    • Views: 1,525
    12-27-2015, 05:48 PM Go to last post
  43. Violating Homogeneity

    Hi, if in regression models homogeneity is violated, the variance can in principle depend on both: Predictor and outcome variable(s). In case...

    Started by mmercker‎, 12-27-2015 06:38 AM
    homogeneity, poisson regression, regression, variance
    • Replies: 4
    • Views: 1,769
    12-27-2015, 03:57 PM Go to last post
  44. Tutorial Kolmogorov Smirnov EVIEWS 9

    https://www.youtube.com/watch?v=GbjGM49liIE Tutorial Kolmogorov Smirnov (Normality Test) eviews 9 made for a Guide, Tutorial, Guide by using Eviews...

    Started by OlhDt_semarang‎, 12-24-2015 11:37 PM
    • Replies: 0
    • Views: 2,738
    12-24-2015, 11:37 PM Go to last post
  45. Calculating mean for Date values using range and counts

    Hi, For the purpose of calculating the average number of days between 2 transactions, I was always 1. subtracting the greater dates from the...

    Started by info_seekeR‎, 12-24-2015 03:45 AM
    average, date, statisitcs
    • Replies: 0
    • Views: 981
    12-24-2015, 03:45 AM Go to last post
  46. Need help about correlation problemi in SPSS?

    Dear all I got some problem about correlation in SPSS. I have 9 water quality monitoring stations. Each station has 3 parameters (dissolve oxygen,...

    Started by satha1975‎, 12-23-2015 09:37 AM
    • Replies: 2
    • Views: 1,576
    12-23-2015, 11:12 PM Go to last post
  47. Which test to us for comparing two data sets, all continous variables

    Hi, Please forgive me, it has been a long time since I have done any stats and I'm a bit stuck. I have two data sets. Each data set consists...

    Started by iceman92‎, 12-21-2015 06:00 PM
    • Replies: 2
    • Views: 1,279
    12-22-2015, 12:37 PM Go to last post
  48. Correlation between torque & hp

    Some hotrodders say that torque wins the race, others say hp. The relationship is. 1 hp= (lb-ft)(5252 RPM) R for each against elapsed time is...

    Started by Outlier‎, 12-22-2015 10:46 AM
    • Replies: 0
    • Views: 1,085
    12-22-2015, 10:46 AM Go to last post
  49. Determine whether the product moment correlation coefficient changes

    https://drive.google.com/open?id=0B-Qk99jFSxW6c2FOTXJsSHkzTjA Can someone please help me with part (e) to determine whether the product moment...

    Started by Deepleeqe‎, 12-22-2015 10:30 AM
    correlation coefficient
    • Replies: 0
    • Views: 838
    12-22-2015, 10:30 AM Go to last post
  50. Question How to comment a projection of data in Principal Composant Analysis?

    From: A=\begin{bmatrix} 1 & 0 & 0\\ 0 & 0 & 1\\ 0 & 1 & 2\\ 2 & 2 & 1\\ 1 & 0 & 0\\ 2 & 3 & 2\\ \end{bmatrix}

    Started by AntoineCompagnie‎, 12-20-2015 12:08 PM
    principal components
    • Replies: 0
    • Views: 980
    12-20-2015, 12:08 PM Go to last post
  51. Question Quintile analysis

    I have data on an aging protein from men. I have divided the data in quintiles. I just want to know what analysis should I use to differentiate...

    Started by Iconforbest‎, 12-19-2015 10:24 AM
    quintiles
    • Replies: 0
    • Views: 1,010
    12-19-2015, 10:24 AM Go to last post
  52. G*Power

    Hello All, I am hoping someone could please help me out. I am using G*Power to assess what sample size I need for a multivariate logistic...

    Started by derekcruise‎, 12-19-2015 04:59 AM
    • Replies: 0
    • Views: 872
    12-19-2015, 04:59 AM Go to last post
  53. Cool Sample Size hw question

    The research team has considered your answers to the above. They’ve narrowed their interest to two outcomes (for now): Number of episodes of early...

    Started by 303oselim‎, 12-18-2015 08:37 PM
    • Replies: 0
    • Views: 910
    12-18-2015, 08:37 PM Go to last post
  54. Factor Analysis Question

    Hello, I am running a factor analysis. The questions from a survey I am using are presently coded (0=never, 1=sometimes, 2=often), can I proceed...

    Started by derekcruise‎, 12-17-2015 09:56 PM
    • Replies: 2
    • Views: 1,261
    12-18-2015, 07:32 PM Go to last post
  55. Factorial ANOVA Research Question

    Hi guys, I have to perform a factorial ANOVA because my research involves 3 independent groups (elite cyclists, semi pro and novice) and a second...

    Started by Deacoz91‎, 12-18-2015 07:47 AM
    • Replies: 3
    • Views: 1,019
    12-18-2015, 09:12 AM Go to last post
  56. Question Problem log(0) practical solution?

    Hello everyone, I want to model the association of a score (range 0-125) and age with an exponential approach because my scatterplot show an...

    Started by Icke‎, 12-18-2015 01:41 AM
    exponential, log, regression
    • Replies: 4
    • Views: 1,395
    12-18-2015, 03:25 AM Go to last post
  57. Aggregated data analysis

    Hi, I would like to know how it would be possible to make a t-test with aggregated data on SPSS or R. My dataset looks like this: ...

    Started by Sarou‎, 12-17-2015 12:23 PM
    • Replies: 0
    • Views: 1,179
    12-17-2015, 12:23 PM Go to last post
  58. How to report a survey results? is it enough mean and SD?

    Hi! I have conducted a survey which collected approx. 90 replies. I presented participants with pairs of 3 types of characters (a human, a cartoon...

    Started by Cokette‎, 12-17-2015 06:59 AM
    • Replies: 0
    • Views: 1,166
    12-17-2015, 06:59 AM Go to last post
  59. How to standardize 3 data sets in SPSS

    Hello, I'm trying to standardize 3 data sets in SPSS to increase the power of my sample to 120 subjects in total. The 3 data sets were all...

    Started by hollana‎, 12-17-2015 04:10 AM
    multiple data sets, spss, standardization, standardize, z-score
    • Replies: 0
    • Views: 1,333
    12-17-2015, 04:10 AM Go to last post
  60. Fine and Grey Analysis

    Dear All I am running a project that has previously being done in the literature using Fine and Gray Analysis to measure Cancer Specific mortality...

    Started by Lukytom92‎, 12-17-2015 01:55 AM
    • Replies: 0
    • Views: 1,327
    12-17-2015, 01:55 AM Go to last post

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