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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: 66,802
    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: 196,841
    07-16-2014, 11:01 AM Go to last post
  1. Help on hw problem

    Answer TRUE or FALSE: (a) The expected value of a binomial distribution is always less than 1. (b) The Weibull distribution is a continuous...

    Started by apple43‎, 10-20-2008 08:19 PM
    • Replies: 2
    • Views: 2,509
    10-20-2008, 10:11 PM Go to last post
  2. Statistics advice

    Hello, I have 6 independent groups and one dependent variable. I did a univariate ANOVA analysis and the overall group significance was not...

    Started by apple7‎, 01-04-2012 11:26 AM
    bonferroni correction, one way anova, t-tests
    • Replies: 2
    • Views: 1,091
    01-04-2012, 01:17 PM Go to last post
  3. Interpreting the Spearman's correlation test coefficient and p-value

    I am currently trying to figure out how to use SPSS and understand the results that are generated by the different tests I'm performing on my data. ...

    Started by AppliedLinguisticsStats‎, 06-23-2016 09:23 AM
    spss correlation test
    • Replies: 0
    • Views: 888
    06-23-2016, 09:23 AM Go to last post
  4. single dependent variable and multiple independent variables

    I have one dependent variable (DV) and eight independent variables (IV). I need to see the effect of each IV on the DV as well as the combined effect...

    Started by appmath‎, 12-25-2013 10:36 AM
    • Replies: 2
    • Views: 1,171
    12-25-2013, 02:49 PM Go to last post
  5. regression analysis in education

    Please help. I have used a computer program in teaching maths as a supplement to determine its effect on student final exam scores. I have the exam...

    Started by appmath‎, 12-24-2013 02:56 AM
    • Replies: 4
    • Views: 1,776
    03-12-2014, 03:19 AM Go to last post
  6. What is better: higher number of participants or identical participants?

    Dear all, I am a language teacher and currently conducting a research project into vocabulary acquisition. For this project, I had a setup of 1...

    Started by apricot crumble‎, 06-17-2007 08:38 PM
    • Replies: 5
    • Views: 4,278
    06-19-2007, 08:49 AM Go to last post
  7. MGF question

    Not to familiar with Moment Generating Functions will some one walk me though this example.... MGF of X1+X2+X3+X4 and MGF or X3+X4

    Started by april_gsu2007‎, 11-08-2012 02:38 PM
    • Replies: 1
    • Views: 1,192
    11-08-2012, 02:41 PM Go to last post
  8. Uncertainty for p = 0 for binomial distribution?

    I have some data (4 runs each of about 10 trials) which is binomial with n_hits/N_trials n/N = 0/11, 0/9, 0/10, 0/10 So, I estimate the...

    Started by apsiloritis‎, 04-28-2011 01:09 PM
    • Replies: 0
    • Views: 1,721
    04-28-2011, 01:09 PM Go to last post
  9. statistics question re margin of error, standard deviation

    I took a test for which the score range was 70-130. A score of 100 represents the average score of my peer group. The standard deviation was 15. My...

    Started by aptapt‎, 06-08-2014 05:17 PM
    margin of error, standard deviation
    • Replies: 0
    • Views: 1,568
    06-08-2014, 05:17 PM Go to last post
  10. Psych Stats - Help with Review Q'z

    I just received a stats review sheet with tons of questions which I am suppose to do as exam review for my psych stats course and I have a few...

    Started by aptiva‎, 05-07-2006 09:59 PM
    • Replies: 3
    • Views: 3,866
    05-09-2006, 08:08 PM Go to last post
  11. binomial/hypothesis tests

    hello for the following question i was able to answer part A and B but i dont know how to answer part C ...

    Started by aptiva‎, 05-17-2006 10:38 AM
    • Replies: 1
    • Views: 2,430
    05-19-2006, 01:45 PM Go to last post
  12. textbook question

    im having trouble with this question - i dont know how the textbook arrived at the answer of losing 1.3 cents per game on average A gambler...

    Started by aptiva‎, 05-21-2006 09:32 PM
    • Replies: 3
    • Views: 3,194
    05-23-2006, 08:18 AM Go to last post
  13. hmwk problem - need help

    One day, it suddenly occurs to you that students at Western seem to be taller than the national average, which you know to be 66 inches. To test your...

    Started by aptiva‎, 05-30-2006 01:55 PM
    • Replies: 1
    • Views: 1,630
    05-31-2006, 12:10 PM Go to last post
  14. Do I perform a Z-test?

    Hi all: Student population 1: M = 62.77, SD = 6.52 Student population 2: M = 72.91, SD = 6.22 Student population 3: M = 74.61, SD = 6.60 ...

    Started by aptiva‎, 02-01-2008 06:10 PM
    • Replies: 2
    • Views: 3,298
    02-04-2008, 02:24 PM Go to last post
  15. Lightbulb Measure Of Central Tendency & Graphical Representation.

    I Am Unable TO Understand The Two New Chapters In Our Syllabus .i.e. To Measure The Central Tendency And Graphical Representation. M Getting...

    Started by Apurva Wadekar‎, 04-24-2011 02:04 AM
    frequency distribution, graphical representation, m.d, s.d
    • Replies: 1
    • Views: 2,933
    04-24-2011, 02:06 AM Go to last post
  16. Need your kind help regarding ANOVA (Your comment will be highly appreciated)

    This is a true/false question of my business statistics course. Please let me know if it is true or false and also kindly provide a brief...

    Started by apuurboo‎, 06-02-2017 02:56 AM
    • Replies: 1
    • Views: 518
    06-02-2017, 03:14 AM Go to last post
  17. 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: 3,130
    11-08-2006, 05:17 PM Go to last post
  18. Survey Size

    I have taken statistics before in college and grad school (MBA), but I am so foggy. I have a simple 10 question survey I am administering in Survey...

    Started by aquabella47‎, 06-12-2009 06:30 PM
    • Replies: 7
    • Views: 6,021
    06-16-2009, 09:27 PM Go to last post
  19. McNemar's Test and sample size: how to estimate discordant pairs?

    This post was in the biostats forum, but a quick review of the previous McNemar's topics shows most were posted in here. I want to use McNemar's...

    Started by Aquaman29‎, 04-26-2016 02:57 PM
    • Replies: 0
    • Views: 1,302
    04-26-2016, 02:57 PM Go to last post
  20. Reporting effect size

    I need to do several ANOVAs followed by Mann-Whitney U's as secondary tests due to non-normality. Does anyone know which test I should report the...

    Started by aquietplace‎, 03-28-2008 04:04 AM
    • Replies: 0
    • Views: 2,701
    03-28-2008, 04:04 AM Go to last post
  21. How best to proceed with mixed ANOVA follow ups

    I have a bit of a problem. My data is non-normal and violates the assumption of spherity, but I have one between subjects factor (only 2 levels) and...

    Started by aquietplace‎, 03-28-2008 10:09 AM
    • Replies: 0
    • Views: 2,649
    03-28-2008, 10:09 AM Go to last post
  22. Fill Missing data according to a distribution

    Hello We are doing this project where in we are measuring the different body dimensions of a number of people. We have data for about 500. In these...

    Started by araipsl‎, 01-27-2010 04:03 AM
    • Replies: 0
    • Views: 2,599
    01-27-2010, 04:03 AM Go to last post
  23. Statistics and data analysis in excel?

    Imagine you have two sets of data. Both sets have 20 values and they list the time it takes for a program to complete an operation. The first set is...

    Started by arapoi01‎, 03-28-2012 02:32 AM
    • Replies: 1
    • Views: 1,858
    03-29-2012, 04:59 AM Go to last post
  24. Question Crises: ANOVA? How to analyse non-normal, non-Homogeneity data with different N group

    Dear all, I'm somewhat new the world of statistics, or at least it has been years since I last used it and basically the only program I know...

    Started by Arasazi‎, 06-05-2013 03:57 AM
    anova, control variables, homogeneity, normal-distribution, regresion analysis
    • Replies: 0
    • Views: 1,268
    06-05-2013, 03:57 AM Go to last post
  25. Test median again hypothesized median value_ one sample Wilcoxon signed ranks test

    I have a question regarding testing a median against a hypothesized value. On a five-point Likert-style scale (1=regressed; 5 = met goal ),...

    Started by arata‎, 11-05-2012 02:21 PM
    hypothesized median, median, ordinal, wilcoxon signed ranks
    • Replies: 6
    • Views: 4,852
    11-07-2012, 05:32 AM Go to last post
  26. Bayes on three diece

    Dear all, Today when I was playing ledo with three dice. I need only two from any single dice. I am new to probability, so I tired to solve by...

    Started by aravin‎, 08-05-2015 06:01 AM
    dice example of three., probabilty
    • Replies: 3
    • Views: 1,407
    08-05-2015, 08:50 AM Go to last post
  27. dunnett test critical value

    i need help in finding the critical value for df=136, a-1=3 the dunnett table only goes up to 120, then next is infinity. how do i interpolate?

    Started by ara_bidopsis22‎, 01-17-2009 05:35 AM
    • Replies: 1
    • Views: 4,035
    01-17-2009, 06:31 AM Go to last post
  28. What test to use for longitudinal data and to test interactions among factors?

    My study involves five plant varieties subjected to three cultivation methods in two different sites. Every week for six weeks, we record the...

    Started by ara_bidopsis22‎, 10-15-2014 05:28 AM
    anova, interactions, longitudinal data
    • Replies: 2
    • Views: 1,507
    10-15-2014, 11:09 PM Go to last post
  29. Upper Bound Error for Expectation Approximation?

    Dear all, I have a problem for the past few weeks and couldn't find the answer in the books or in the internet. I know that in general: E(g(X1,...

    Started by arbab61‎, 11-22-2013 04:02 PM
    error bound, expectation
    • Replies: 9
    • Views: 1,464
    11-24-2013, 08:38 PM Go to last post
  30. Fisher's exact

    Hi, just found this forum :wave: Have a quick (and probably silly) question about Fisher's exact test - is this purely for a 2x2 table, or can it...

    Started by archaeojo‎, 05-25-2010 09:09 AM
    • Replies: 0
    • Views: 3,264
    05-25-2010, 09:09 AM Go to last post
  31. non linear regression

    hi, I want to estimate quasi hyperbolic discounting model: x= b* (1/(1+r)^t) *y where b and r are my parameters and i want to estimate them...

    Started by archana‎, 04-08-2014 07:37 AM
    • Replies: 1
    • Views: 801
    04-08-2014, 08:39 AM Go to last post
  32. 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: 1,481
    01-07-2016, 06:19 PM Go to last post
  33. Kernel Matrix Not Positive Definite

    Hi everyone, there is a problem that has been bothering me for a few days now. I'll try to explain it as best as I can, but since I'm new to...

    Started by Archangelic‎, 05-24-2012 11:30 AM
    • Replies: 0
    • Views: 1,186
    05-24-2012, 11:30 AM Go to last post
  34. 5-point likert scale

    i am currently carrying out a study for my dissertation for my physiotherapy degree I devised a questionnaire using the 5-point likert scale...

    Started by arcole‎, 01-04-2008 10:16 AM
    • Replies: 2
    • Views: 6,825
    03-18-2008, 03:34 AM Go to last post
  35. Added-Variable Plot for Panel Data

    Dear all, in Frees (2004): "Longitudinal and Panel Data" there is a short description of a procedure for Added-Variable or partial regression...

    Started by ARDE‎, 02-12-2013 07:46 AM
    added variable plot, panel data, partial regression plot
    • Replies: 0
    • Views: 1,406
    02-12-2013, 07:46 AM Go to last post
  36. [Sampling] Which type of sampling to use in this case

    I would appreciate any help in this case took from a book (without answers and tips): Consider that a court wishes to evaluate the proportion of...

    Started by Ardêncio‎, 04-11-2017 09:01 AM
    • Replies: 4
    • Views: 1,172
    04-11-2017, 11:42 AM Go to last post
  37. GLM Repeated Measures: What is the difference Covariates and Between subject factors

    Hi I have two categorical variables: gender and gaming experience. When i run ANOVA in SPSS, i enter them as covariates (meaning its an ANCOVA...

    Started by ardenz‎, 08-18-2006 03:51 AM
    • Replies: 1
    • Views: 17,064
    07-04-2007, 03:10 PM Go to last post
  38. Autocorrelation

    Does anyone the effect of serial correlation caused by seasonal effect to standard error of if I have a seasonal effect in both your dependent and...

    Started by ardinea‎, 09-06-2012 06:57 PM
    • Replies: 2
    • Views: 1,586
    09-09-2012, 05:55 AM Go to last post
  39. Kolmogorov-Smirnov Z - how to calculate effect size??

    Hi there, A similar question to Laura's- how do I calculate effect sizes for the Kolmogorov-Smirnov Z? Is the Z value given by SPSS what I need,...

    Started by Arekushia‎, 12-19-2006 07:32 AM
    • Replies: 0
    • Views: 8,778
    12-19-2006, 07:32 AM Go to last post
  40. sample size for SEM and statistical tests

    Hi, I'm about to launch a quantitative study with an organization. I thought of testing my hypotheses using SEM and some statistical tests. I...

    Started by aretai‎, 11-18-2010 04:20 AM
    • Replies: 3
    • Views: 7,173
    11-21-2010, 02:29 AM Go to last post
  41. Comparing class grades across several courses – is ANOVA appropriate?

    Hi all, A group of ~20 students have taken a number of courses, some compulsory and others electives. I want to see whether there is a difference...

    Started by Arete‎, 04-26-2013 09:35 PM
    • Replies: 3
    • Views: 31,440
    04-28-2013, 07:02 PM Go to last post
  42. test statistic?

    "A new flu vaccine has been administered in a small community. The vaccine was provided free of charge in a two-shot sequence. Some people received...

    Started by argh.im.a.pirate‎, 05-16-2009 10:16 PM
    • Replies: 3
    • Views: 3,695
    05-17-2009, 08:05 AM Go to last post
  43. Chi Square Probability (Critical Value)

    For an applied linguistics course I do need your help. Unfortunately , for Df= 1 the values beyond p < 0.001 are not available in chi-square...

    Started by argusrockbar‎, 11-17-2015 05:19 AM
    • Replies: 3
    • Views: 1,581
    11-17-2015, 12:03 PM Go to last post
  44. Question Change score question

    I am working on a pre/post intervention data set with n=19 with approximately 15 continuous subscales. When conducting paired sample ts we did not...

    Started by arhiles‎, 02-17-2011 11:57 PM
    • Replies: 0
    • Views: 2,855
    02-17-2011, 11:57 PM Go to last post
  45. Question Can you help?

    Can anyone help with survey sampling? I need help with my Sampling Methods class. I have three homework questions that I have no idea how to...

    Started by arhodes1‎, 09-18-2005 09:24 PM
    • Replies: 8
    • Views: 4,402
    09-21-2005, 08:13 AM Go to last post
  46. not significant correlation...

    Hi there!!! I am wondering whether you can help me I am not familiar with statistics and I am trying to interpret the outcome of a bivariate...

    Started by ARI‎, 02-03-2011 12:19 AM
    • Replies: 6
    • Views: 38,715
    02-03-2011, 06:58 PM Go to last post
  47. bayesian estimation with amos 16

    I have a model with 11 laten variables,I run bayesian estimation with amos 16. and the estimation is doesn't work. is there anyone ever has a some...

    Started by Ari Anggorowati‎, 12-05-2010 11:16 PM
    • Replies: 0
    • Views: 2,593
    12-05-2010, 11:16 PM Go to last post
  48. determining internal validity of conjoint model

    Hi guys, I'm having a problem with determing the internal validity of my conjoint model. I have used a fractional factorial design for a full...

    Started by ari gold‎, 03-25-2009 02:03 PM
    • Replies: 0
    • Views: 4,115
    03-25-2009, 02:03 PM Go to last post
  49. Detecting significance between percentages

    I have a really basic question, pertaining to data analysis for my senior thesis. I've conducted a review of mammalian reintroductions over the...

    Started by ari1117‎, 04-26-2011 04:29 PM
    • Replies: 1
    • Views: 1,753
    04-26-2011, 04:33 PM Go to last post
  50. Exclamation Data Modelling

    I need to learn predictive modelling in data analytics. Please tell me the good books and/or online resources that can be of use. I am a beginner and...

    Started by arian29‎, 06-07-2014 02:06 AM
    • Replies: 0
    • Views: 1,705
    06-07-2014, 02:06 AM Go to last post
  51. Possible to test for differences between Pearson and Spearman Correlations?

    Hello. I was wondering if it is possible to test differences in correlations between a pearson correlation and a Spearman correlation from the same...

    Started by Ariel‎, 04-17-2010 08:18 AM
    • Replies: 0
    • Views: 2,705
    04-17-2010, 08:18 AM Go to last post
  52. Help needed! Main effect and interaction question

    I have a MINITAB printout I was hoping someone could help me with. My question is- from the table below how do i distinguish between a main effect...

    Started by ariele‎, 12-03-2011 06:53 PM
    interaction effect, main effect
    • Replies: 1
    • Views: 1,590
    12-05-2011, 03:16 PM Go to last post
  53. Is my continuous data relevant, or am I stuck with attribute data?

    I would like to validate a laser-welding process, which joins two metal components. We have a reliability/confidence requirement of 95% Reliability...

    Started by AriGoldberg‎, 04-08-2016 06:04 PM
    attribute continuous
    • Replies: 4
    • Views: 1,186
    04-11-2016, 11:41 AM Go to last post
  54. Stats help - IV with ONE level?!

    Marghhhh :| This doesnt appear to exist in the stats textbooks so I'm sure I'm completely missing the point. Basically I have 3 groups of...

    Started by arikel‎, 12-05-2007 09:04 AM
    • Replies: 0
    • Views: 2,146
    12-05-2007, 09:04 AM Go to last post
  55. When to do post-hocs on ANOVA

    Hi all, I have a RM anova with a between subjects factor. My significance level is 0.079 for the between subjects factor. I'm wondering whether it...

    Started by arikel‎, 03-12-2008 06:51 AM
    • Replies: 4
    • Views: 3,751
    03-29-2008, 01:19 PM Go to last post
  56. Discussing a trend in your data

    Hello all, My main variable in my data analysis only reaches trend level of significance (p=0.07). I'm wondering whether it is appropriate to...

    Started by arikel‎, 03-21-2008 04:15 PM
    • Replies: 2
    • Views: 2,634
    03-25-2008, 06:32 AM Go to last post
  57. Negative R-squared?

    When I enter all my predictors into my model, it comes out with an adjusted R2 thats negative - what does this mean? I thought R2 could only be...

    Started by arikel‎, 04-01-2008 11:57 AM
    • Replies: 2
    • Views: 5,807
    04-02-2008, 04:30 PM Go to last post
  58. Follow up tests in 2x4 ANOVA (mixed)

    I have 2 groups and 4 conditions. There was a significant group*condition interaction. To follow up this interaction, as there are only 2 groups,...

    Started by arikel‎, 04-03-2008 05:58 AM
    • Replies: 0
    • Views: 7,364
    04-03-2008, 05:58 AM Go to last post
  59. Ceiling effects in regression

    Hi all, I have quite a marked ceiling effect in my regression - what will this do in terms of assumptions? is it just normality or also...

    Started by arikel‎, 04-18-2008 07:43 AM
    • Replies: 2
    • Views: 6,649
    04-18-2008, 09:02 AM Go to last post
  60. Project statistics proofread!

    Hi all, I was wondering whether anyone would mind proofreading my project in terms of statistics... the results section is only about 1000-1500...

    Started by arikel‎, 04-21-2008 12:38 PM
    • Replies: 0
    • Views: 2,301
    04-21-2008, 12:38 PM Go to last post

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