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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: 196,542
    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: 66,610
    09-30-2005, 09:44 AM Go to last post
  1. Goodness fit tests

    Hello, I have a data serie, I've run the program easyfit and I've got all possible probability distributions that can fit my data. My question is:...

    Started by chaos4u2‎, 09-23-2015 11:05 AM
    • Replies: 2
    • Views: 1,153
    09-23-2015, 11:52 AM Go to last post
  2. A measure for agreement between raters scoring

    Hi - I'm looking for a measure for the level of agreement between a number of raters who score performance of something on 1-4 scoring range. ...

    Started by jgray‎, 09-15-2015 03:37 PM
    concordance, consensus, inter-rater reliability
    • Replies: 4
    • Views: 1,629
    09-23-2015, 11:11 AM Go to last post
  3. Exclamation Test study Guide questions (urgent help)

    1) Obama played golf an average of 3.2 times a month with a standard deviation of .2. President G. W. Bush visited wounded military in the hospital...

    Started by kevin23‎, 09-22-2015 09:47 PM
    • Replies: 1
    • Views: 2,915
    09-23-2015, 05:50 AM Go to last post
  4. GLM Univariate with unequal variances - what are my options?

    Hi, I'm using SPSS to run a GLM univariate with 1 fixed factor (Treatment) and one random factor (experimental replicate). There are 4 treatment...

    Started by RebeccaK‎, 09-23-2015 12:44 AM
    • Replies: 0
    • Views: 2,034
    09-23-2015, 12:44 AM Go to last post
  5. Postgraduate Dissertation - Testing Significance of Suspended Solids Data

    Hi guys, So I'm new and completely stumped. I'm working on my MSc dissertation and have hit a brick wall with the analysis. I've recorded some...

    Started by SKEMP‎, 09-21-2015 04:50 AM
    • Replies: 3
    • Views: 999
    09-22-2015, 03:01 PM Go to last post
  6. I have converted my data to a ratio, do I use the same methods to calculate the SEM?

    Hi there First, post hopefully in the right place - the phrase "elementary" summed up my level of knowledge. I'm comparing the growth of cells...

    Started by drgpenman‎, 09-22-2015 12:54 PM
    • Replies: 0
    • Views: 1,119
    09-22-2015, 12:54 PM Go to last post
  7. Relation between P and HR(Hazard Ratio)

    I am doing a project on meta-analysis on breast cancer analogues. The clinical trial papers related to my topic contain insufficient statistical...

    Started by VISHAKHA‎, 09-22-2015 03:50 AM
    • Replies: 1
    • Views: 726
    09-22-2015, 08:14 AM Go to last post
  8. [SOLVED] help with a model

    Hi I have a problem that I am not too familiar with in practical terms but have a braod understanding what I need to do, just not sure it is valid...

    Started by bugman‎, 09-17-2015 06:22 PM
    • Replies: 3
    • Views: 2,050
    09-22-2015, 01:41 AM Go to last post
  9. Simple Linear Regression & Correlation

    Hi all, I'm hoping you can assist with my question, i'm having trouble getting the answer right, it's not aligning with the solution in the...

    Started by cocogabrielle‎, 09-21-2015 08:44 PM
    • Replies: 1
    • Views: 990
    09-21-2015, 09:20 PM Go to last post
  10. Post How can I find the average quote turn around time in days

    Hello Community :wave:, Please can you advise how I can find the average response time in days from the attached bar graph (e.g. 2.3 days etc) ...

    Started by TeslaCoil‎, 09-21-2015 05:09 AM
    bar chart average
    • Replies: 2
    • Views: 1,413
    09-21-2015, 02:05 PM Go to last post
  11. Help!

    I have a problem that is probably fairly simple but I have writers block. This is to do with unnamed animals. I have three tests I have conducted...

    Started by davcams‎, 09-21-2015 01:33 AM
    chi square test, help?
    • Replies: 1
    • Views: 996
    09-21-2015, 12:47 PM Go to last post
  12. This may be quite simple for you...

    Hi Just looking for some help 49211 patients attended our emergency department last year. 146 attended on their birthday ( should have been 135...

    Started by harishvk‎, 09-19-2015 02:50 AM
    • Replies: 1
    • Views: 1,577
    09-21-2015, 12:16 PM Go to last post
  13. Stats Help

    Hi All, Hopefully a nice easy question that someone can help me with. I have just run a psychological study looking at a number of different...

    Started by cphillips1‎, 09-21-2015 11:03 AM
    • Replies: 5
    • Views: 926
    09-21-2015, 11:40 AM Go to last post
  14. Choosing a representative reference value

    Hello, let's see if someone can help me with this. I have a data series of a year of road traffic in a concrete point (number of vehicles/day) ...

    Started by chaos4u2‎, 09-17-2015 02:58 AM
    statistic, sufficient
    • Replies: 5
    • Views: 1,599
    09-21-2015, 07:52 AM Go to last post
  15. Exclamation Testing if people like one thing than another

    I want to test given a certain scenario, if people will like one thing than another. Say there are 20 participants, 7 of them will chose A, 10...

    Started by maxpayne200‎, 09-20-2015 09:53 PM
    popularity, significant difference
    • Replies: 1
    • Views: 1,171
    09-21-2015, 03:54 AM Go to last post
  16. Best choice for repeated-measures Likert data

    Hello all, I am currently working with several hundred participants' responses at two different time points (before/after an intervention aimed at...

    Started by libertylanding‎, 09-19-2015 07:01 PM
    • Replies: 0
    • Views: 841
    09-19-2015, 07:01 PM Go to last post
  17. [chi-square test] Should I use a chi-square test or other test?

    Hello guys, I'm analyzing the question: "Is Age a factor that influences having high blood pressure?" The survey was divided to age...

    Started by GerPro‎, 09-19-2015 05:11 AM
    • Replies: 2
    • Views: 1,195
    09-19-2015, 03:21 PM Go to last post
  18. Question General Stats Problem. !How to create a power curve using excel?

    Can someone help me to solve these 4 questions?I'll appreciate it!!! I'm so confused. Lexico specializes in the manufacture of coated cables....

    Started by mandy2017‎, 09-19-2015 12:12 PM
    power curve, stats help
    • Replies: 1
    • Views: 3,375
    09-19-2015, 12:52 PM Go to last post
  19. Normality test

    I will use Normal probability plot or Shapiro-Wilk test for normality check. But is it that straightforward or there is some subtlety in this? ...

    Started by locuschan‎, 09-19-2015 12:34 AM
    • Replies: 1
    • Views: 1,306
    09-19-2015, 06:14 AM Go to last post
  20. [chi-square test] Should I use a chi-square test or other test?

    Hello guys, I'm analyzing the question: "Is Age a factor that influences having high blood pressure?" The survey was divided to age...

    Started by GerPro‎, 09-19-2015 04:37 AM
    • Replies: 0
    • Views: 1,004
    09-19-2015, 04:37 AM Go to last post
  21. Big Trouble in Little China

    My student has a study population of 18962 recorded deliveries. Out of 18962, congenital anomalies were 164. She used a study sample of 2125 which...

    Started by Saadi Barwari‎, 09-18-2015 06:55 AM
    • Replies: 2
    • Views: 1,795
    09-19-2015, 02:05 AM Go to last post
  22. 2x2 repeated measures Anova or one way

    I need help with the analysis of my latest experiment, I need to write it up by Mon so please help! I have two conditions with two different time...

    Started by Kinga‎, 09-18-2015 05:34 PM
    anova
    • Replies: 0
    • Views: 1,727
    09-18-2015, 05:34 PM Go to last post
  23. ANOVA Test requirements

    I got a research article that I need to critically evaluate and I want to check whether the study meet the criteria for using ANOVA test (i.e....

    Started by tonynz‎, 04-07-2011 11:13 AM
    • Replies: 2
    • Views: 5,513
    09-18-2015, 03:59 PM Go to last post
  24. f test

    how i use f table value 5percent v1 = 10 and v2 = 3

    Started by azhar‎, 09-18-2015 02:21 PM
    • Replies: 2
    • Views: 1,763
    09-18-2015, 03:53 PM Go to last post
  25. Correlation study design question from a healthcare worker

    Hi everyone, I am about to start a research project and am stuck with a methodological issue. I am investigating the value of a routinely measured...

    Started by verizon‎, 09-17-2015 08:00 PM
    • Replies: 1
    • Views: 1,213
    09-17-2015, 08:18 PM Go to last post
  26. Question Comparing proportions

    Hello, I need some help knowing what stats to run for my data analysis. I have samples of muscle collected during different seasons and I am...

    Started by bvelten‎, 09-17-2015 03:19 PM
    exact test, proportions
    • Replies: 5
    • Views: 1,180
    09-17-2015, 05:25 PM Go to last post
  27. Help with formula to test if visits are evenly distributed throughout the day

    I need help with a formula to test if visits are evenly distributed throughout the day. I have sales officers who are suppose to work for 8 hours a...

    Started by red7272‎, 09-15-2015 10:14 AM
    • Replies: 3
    • Views: 1,238
    09-17-2015, 02:23 PM Go to last post
  28. Factor Effects with 12 Factors, 35 Levels

    Hi all, I'd like your help on an analysis I'm trying to perform. Please have a little patience in your responses - I've had a crash course in a...

    Started by GG85‎, 09-17-2015 11:35 AM
    • Replies: 1
    • Views: 1,282
    09-17-2015, 01:00 PM Go to last post
  29. Chi squared and logistic regression - are these the right tests?

    Hi. I'm trying to decide what statistical tests I need to run on my data, and sadly it's been several years since I've had to actually do that - for...

    Started by The13thDoll‎, 09-17-2015 11:13 AM
    • Replies: 0
    • Views: 729
    09-17-2015, 11:13 AM Go to last post
  30. How to Analyze: Comparing two proportions

    Hello, I need advice on how to analyze a simple set of data. For simplicity's sake I'll make up the variables. Question: A store keeps track of...

    Started by akneidel‎, 09-16-2015 03:19 PM
    compare, proportions
    • Replies: 3
    • Views: 1,111
    09-17-2015, 07:58 AM Go to last post
  31. Finding percentiles from a given data

    Hi All This is my first post. I have just started learning statistics so my question might seem pretty trivial. Consider following data...

    Started by MeenuS‎, 09-16-2015 09:06 PM
    • Replies: 4
    • Views: 1,227
    09-17-2015, 02:03 AM Go to last post
  32. SPSS Syntax - Assigning Labels to Multiple Variables

    Hi all! I was just wondering if there was a way to automate a certain task. I'd like to assign a "1" or a "2" to specific cases and variables in...

    Started by dgiacomi‎, 09-16-2015 09:38 AM
    • Replies: 1
    • Views: 2,117
    09-16-2015, 07:26 PM Go to last post
  33. Finding heterogeneity in simple data set (which day is the most different?)

    I have a data set with an amount of tests that were done by a group of people for each day over two weeks (no weekends). Basically, I need to know...

    Started by valkener‎, 09-16-2015 02:35 PM
    heterogeneity, homogeneity, pairwise comparison
    • Replies: 0
    • Views: 1,563
    09-16-2015, 02:35 PM Go to last post
  34. Compliance in time

    Hi friends, A question i would like to see if there is a significant change in time in a city to mammography screening. 2010: 678 of 949 came...

    Started by drgunnar‎, 09-15-2015 01:26 PM
    • Replies: 2
    • Views: 1,184
    09-16-2015, 04:09 AM Go to last post
  35. Gaining confidence - real world problem.

    Hello guys and girls, this is my first post here, so please be gentle. And I'll start by saying that I have used google and looked at the FAQs. I...

    Started by Mikers‎, 09-10-2015 07:52 AM
    • Replies: 4
    • Views: 1,322
    09-16-2015, 02:18 AM Go to last post
  36. [SOLVED] beta distribution

    I am trying to understand the beta distribution to fit some simulated percentage data from a MC simulation, such as: beta.sim<-rbeta(30, 2, 5, ncp...

    Started by bugman‎, 09-14-2015 11:29 PM
    • Replies: 2
    • Views: 1,307
    09-15-2015, 06:16 PM Go to last post
  37. Exclamation Fitting a distribution to continuous data

    Hello, I have a data set of 1300 samples and I am trying to find out the distribution for these data. I have used ARENA's Input Analyzer to find...

    Started by rajaanveshbaru‎, 09-12-2015 01:33 PM
    • Replies: 13
    • Views: 2,010
    09-15-2015, 07:53 AM Go to last post
  38. Panel regression: Fixed effects and time fixed effects

    I have a question regarding the fixed effects and the time fixed effects model for panel data. If I want to use these models can I just assume...

    Started by Grunez32‎, 09-15-2015 07:34 AM
    • Replies: 0
    • Views: 1,331
    09-15-2015, 07:34 AM Go to last post
  39. Two-way repeted measures or mixed ANOVA?

    Hello, we are doing an experiment where body consistence (weight, proportion of muscles, fat, etc.) are measured. We have 103 respondents, water...

    Started by KatkaK‎, 09-14-2015 01:19 PM
    mixed anova, rlanguage, two-way repeated measures
    • Replies: 0
    • Views: 1,178
    09-14-2015, 01:19 PM Go to last post
  40. Need help - What test should this involve?

    Hi, I am doing a research assignment on a nursing subject involving the complications of a post-surgical blood transfusions through different...

    Started by StartAtTheEnd‎, 09-14-2015 05:03 AM
    • Replies: 0
    • Views: 1,231
    09-14-2015, 05:03 AM Go to last post
  41. Finding percentile, what am I doing wrong?

    mean = 72, standard deviation = 10 Find the 75th percentile Find the 30th percentile So first I found my z score of .67, and solved x to be...

    Started by JWade‎, 09-12-2015 09:25 PM
    • Replies: 2
    • Views: 1,430
    09-13-2015, 09:59 PM Go to last post
  42. Normal distribution tables

    So I am having a hard time deciphering when to look at the "larger portion" vs the "smaller portion" on distribution tables for word problems. ...

    Started by JWade‎, 09-12-2015 06:30 PM
    • Replies: 1
    • Views: 1,597
    09-13-2015, 10:54 AM Go to last post
  43. Which statistical test is correct?!

    Hi, I'm wondering if someone knowledgeable on statistics could provide assistance. I'm working on a study in which I evaluate the success of...

    Started by whatevertsunami‎, 09-08-2015 12:58 PM
    • Replies: 2
    • Views: 1,108
    09-13-2015, 03:58 AM Go to last post
  44. help with homework question

    a random sample of 51 observations was selected from a normally distributed population. the sample mean was 88.6 and sample variance was 38.2. we...

    Started by TODZAA‎, 09-12-2015 02:30 AM
    • Replies: 1
    • Views: 1,615
    09-12-2015, 06:38 AM Go to last post
  45. New here and completely lost :/

    Hello everyone! I’m a newbie here and to be honest in desperation googled “psychology statistics forum” thinking no way I’d find one and low and...

    Started by Turnip‎, 09-08-2015 04:52 PM
    introduction
    • Replies: 8
    • Views: 1,557
    09-11-2015, 04:55 PM Go to last post
  46. Odds ratio

    Dear friends, I would like to ask you a question. Sometimes the results from medical present their results with odds ratio. For example, the...

    Started by drgunnar‎, 09-10-2015 02:37 PM
    • Replies: 7
    • Views: 1,753
    09-11-2015, 12:05 PM Go to last post
  47. Lightbulb How to analyse a experiment on repellence

    Dear all, I have a fairly simple experiment with a petri dish, some worms and two treatments (water, anti-worm treatment). I segmented the petri...

    Started by michaelhelmut‎, 09-11-2015 08:10 AM
    decision, repellency
    • Replies: 1
    • Views: 1,264
    09-11-2015, 08:33 AM Go to last post
  48. help needed with satisfaction survey

    Hi Everyone, I am trying to statistically work out the independence between variables such as satisfaction rate and complaint's presentation for...

    Started by however‎, 09-04-2015 02:00 PM
    • Replies: 6
    • Views: 1,738
    09-11-2015, 03:42 AM Go to last post
  49. Weighted Kappa vs. ICC for rater agreement

    I am helping a friend with a research study. Two raters are ranking publications based on 31 yes or no questions. For each question they assign a...

    Started by ultimateguy‎, 09-10-2015 01:36 PM
    icc
    • Replies: 1
    • Views: 2,812
    09-10-2015, 02:27 PM Go to last post
  50. comparison of measurements of two methods - determination of reliability

    The aim is to compare two measurement methods. Therefore with each method two consecutive measurements were performed on 25 subjects (so overall 4 x...

    Started by Betty987‎, 09-06-2015 07:31 AM
    method-comparison, reliability
    • Replies: 1
    • Views: 1,052
    09-10-2015, 02:07 PM Go to last post
  51. Bootstraping multiple confidence intervals during same procedure

    I am planning to bootstrap multiple parameters' confidence intervals using one overall bootstrapping procedure. Is there any reason I should not do...

    Started by hlsmith‎, 09-10-2015 08:59 AM
    • Replies: 0
    • Views: 904
    09-10-2015, 08:59 AM Go to last post
  52. Non-para: "THE CONFIDENCE INTERVAL FOR MEDIAN BASED ON SIGN"

    So my professor decided to write his own textbook, and we are finding errors everywhere, and it's difficult to understand, so I've tried google-ing...

    Started by Kenzie‎, 09-09-2015 05:37 PM
    confidence interval, nonparametric, sas, sign test, spss
    • Replies: 5
    • Views: 1,420
    09-09-2015, 07:22 PM Go to last post
  53. OR with multiple variables!!

    Hi everyone! I guess this is easy, but I'm not too good in statistics so I need some help!! I'm trying to evaluate a case-control study, where...

    Started by Carlos Medina‎, 09-09-2015 06:48 PM
    multiple variables, odds ratio
    • Replies: 1
    • Views: 1,316
    09-09-2015, 07:12 PM Go to last post
  54. Unsure if I need to transform my data or use a p-value correction for multiple comps.

    Hello all, Right off the bat I'd like to say that I'm pretty new to statistics and am having to employ some for analysing the results of a...

    Started by krts‎, 09-08-2015 05:21 PM
    • Replies: 4
    • Views: 1,685
    09-09-2015, 07:27 AM Go to last post
  55. standard error

    Can I put a standard error on a standard error? Please explain.

    Started by friedchicken‎, 09-08-2015 08:50 AM
    standard error
    • Replies: 1
    • Views: 896
    09-08-2015, 11:49 AM Go to last post
  56. how to interpret this

    the GPBTs for our biofuel production systems varied from 1 to 162 years (95% range; median of 19 years) The longest GPBTs were found in the...

    Started by tanzila02‎, 09-08-2015 07:00 AM
    • Replies: 1
    • Views: 1,266
    09-08-2015, 09:49 AM Go to last post
  57. Sum of Squares help!

    My homework problem says: For the following summary statistics, find ∑X and SS (sum of squares) a. XBar = 25, s = 10, n = 11 So, I think...

    Started by JWade‎, 09-06-2015 12:44 PM
    2 Pages
    1 2
    sum of squares
    • Replies: 23
    • Views: 4,319
    09-07-2015, 08:37 PM Go to last post
  58. Biostatistics!

    Assume that adults have pulse rate (beats per minute) with mean of 72.9 and a standard deviation of 12.3 (based on data from the National Health...

    Started by ricekicks‎, 09-07-2015 01:41 PM
    • Replies: 5
    • Views: 2,649
    09-07-2015, 04:16 PM Go to last post
  59. Non-proportion percentage as a response

    Moderator note: This thread was split from a previous thread as it didn't directly address the question in the previous thread and deserves its own...

    Started by MatteC‎, 09-03-2015 07:48 AM
    beta regression, proportion
    • Replies: 9
    • Views: 2,221
    09-07-2015, 08:37 AM Go to last post
  60. Is hierarchical multiple regression a form of multillevel regression?

    Is hierarchical multiple regression a form of multillevel regression? I've tried Googling it, searching on statistic books and I just can't seem to...

    Started by r4ch3l‎, 09-04-2015 04:50 PM
    2 Pages
    1 2
    • Replies: 15
    • Views: 3,796
    09-06-2015, 01:26 AM Go to last post

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