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# Forum: Statistics

Statistics course and homework discussion. Elementary statistics.

1. ### 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...

• Replies: 1
• Views: 196,542
07-16-2014, 11:01 AM
2. ### 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)...

• Replies: 0
• Views: 66,610
09-30-2005, 09:44 AM
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:...

• Replies: 2
• Views: 1,153
09-23-2015, 11:52 AM
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. ...

• Replies: 4
• Views: 1,629
09-23-2015, 11:11 AM
3. ### 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...

• Replies: 1
• Views: 2,915
09-23-2015, 05:50 AM
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...

• Replies: 0
• Views: 2,034
09-23-2015, 12:44 AM
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...

• Replies: 3
• Views: 999
09-22-2015, 03:01 PM
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...

• Replies: 0
• Views: 1,119
09-22-2015, 12:54 PM
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...

• Replies: 1
• Views: 726
09-22-2015, 08:14 AM
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...

• Replies: 3
• Views: 2,050
09-22-2015, 01:41 AM
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...

• Replies: 1
• Views: 990
09-21-2015, 09:20 PM
10. ### 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) ...

• Replies: 2
• Views: 1,413
09-21-2015, 02:05 PM
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...

• Replies: 1
• Views: 996
09-21-2015, 12:47 PM
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...

• Replies: 1
• Views: 1,577
09-21-2015, 12:16 PM
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...

• Replies: 5
• Views: 926
09-21-2015, 11:40 AM
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) ...

• Replies: 5
• Views: 1,599
09-21-2015, 07:52 AM
15. ### 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...

• Replies: 1
• Views: 1,171
09-21-2015, 03:54 AM
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...

• Replies: 0
• Views: 841
09-19-2015, 07:01 PM
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...

• Replies: 2
• Views: 1,195
09-19-2015, 03:21 PM
18. ### 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....

• Replies: 1
• Views: 3,375
09-19-2015, 12:52 PM
19. ### [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...

• Replies: 0
• Views: 1,004
09-19-2015, 04:37 AM
20. ### 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...

• Replies: 2
• Views: 1,795
09-19-2015, 02:05 AM
21. ### 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...

• Replies: 0
• Views: 1,727
09-18-2015, 05:34 PM
22. ### 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....

• Replies: 2
• Views: 5,513
09-18-2015, 03:59 PM
23. ### 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...

• Replies: 1
• Views: 1,213
09-17-2015, 08:18 PM
24. ### 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...

• Replies: 5
• Views: 1,180
09-17-2015, 05:25 PM
25. ### 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...

• Replies: 3
• Views: 1,238
09-17-2015, 02:23 PM
26. ### 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...

• Replies: 1
• Views: 1,282
09-17-2015, 01:00 PM
27. ### 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...

• Replies: 0
• Views: 729
09-17-2015, 11:13 AM
28. ### 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...

• Replies: 3
• Views: 1,111
09-17-2015, 07:58 AM
29. ### 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...

• Replies: 4
• Views: 1,227
09-17-2015, 02:03 AM
30. ### 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...

• Replies: 1
• Views: 2,117
09-16-2015, 07:26 PM
31. ### 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...

• Replies: 0
• Views: 1,563
09-16-2015, 02:35 PM
32. ### 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...

• Replies: 2
• Views: 1,184
09-16-2015, 04:09 AM
33. ### 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...

• Replies: 4
• Views: 1,322
09-16-2015, 02:18 AM
34. ### [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...

• Replies: 2
• Views: 1,307
09-15-2015, 06:16 PM
35. ### 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...

• Replies: 0
• Views: 1,331
09-15-2015, 07:34 AM
36. ### 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...

• Replies: 0
• Views: 1,178
09-14-2015, 01:19 PM
37. ### 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...

• Replies: 0
• Views: 1,231
09-14-2015, 05:03 AM
38. ### 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...

• Replies: 2
• Views: 1,430
09-13-2015, 09:59 PM
39. ### 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. ...

• Replies: 1
• Views: 1,597
09-13-2015, 10:54 AM
40. ### 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...

• Replies: 2
• Views: 1,108
09-13-2015, 03:58 AM
41. ### 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...

• Replies: 1
• Views: 1,615
09-12-2015, 06:38 AM
42. ### 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...

• Replies: 8
• Views: 1,557
09-11-2015, 04:55 PM
43. ### 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...

• Replies: 7
• Views: 1,753
09-11-2015, 12:05 PM
44. ### 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...

• Replies: 1
• Views: 1,264
09-11-2015, 08:33 AM
45. ### 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...

• Replies: 6
• Views: 1,738
09-11-2015, 03:42 AM
46. ### 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...

• Replies: 1
• Views: 2,812
09-10-2015, 02:27 PM
47. ### 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...

• Replies: 1
• Views: 1,052
09-10-2015, 02:07 PM
48. ### 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...

• Replies: 0
• Views: 904
09-10-2015, 08:59 AM
49. ### 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...

• Replies: 5
• Views: 1,420
09-09-2015, 07:22 PM
50. ### 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...

• Replies: 1
• Views: 1,316
09-09-2015, 07:12 PM
51. ### standard error

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

• Replies: 1
• Views: 896
09-08-2015, 11:49 AM
52. ### 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...

• Replies: 1
• Views: 1,266
09-08-2015, 09:49 AM
53. ### 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...

• Replies: 23
• Views: 4,319
09-07-2015, 08:37 PM
54. ### 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...

• Replies: 5
• Views: 2,649
09-07-2015, 04:16 PM
55. ### 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...

• Replies: 9
• Views: 2,221
09-07-2015, 08:37 AM
56. ### 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...

• Replies: 15
• Views: 3,796
09-06-2015, 01:26 AM

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