1. Announcement:
05-10-2017
Views:
1,960
Page 15 of 294 First 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 65 115 ... Last
Threads 841 to 900 of 17595

# Forum: Statistics

Statistics course and homework discussion. Elementary statistics.

1. ### 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: 67,061
09-30-2005, 09:44 AM
2. ### 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: 197,315
07-16-2014, 11:01 AM
1. ### Percentile

Hello! Anyone please let me know how to report percentile in APA format please (I cannot find it!) ? Also, if 95th percentile of vitamin C...

• Replies: 0
• Views: 2,027
07-12-2013, 05:34 PM
2. ### independent or related sample?

Hi, I am confusing what is independent/related sample... I know this is basic but if anyone can tell me please! I understand that related sample...

• Replies: 0
• Views: 1,746
07-13-2013, 05:47 PM
3. ### Survival Analysis with two types of event

Hi, guys! I'm looking for an example of kaplan meier with two different types of event, e.g. tumor progression or death as outcomes. Somebody knows...

• Replies: 2
• Views: 308
08-16-2017, 02:15 PM
4. ### Failure and Factor Analysis

I am analyzing failures on cars. I am not trying to find which is the root cause of the problem (for now), I just want to verify if an specific...

• Replies: 1
• Views: 984
07-11-2013, 10:34 AM
5. ### Grouping/indexing variables

Me and a fellow student are working on our master thesis and have a statistic related question that we were hoping you could help us with? Our...

• Replies: 0
• Views: 846
06-17-2015, 08:50 AM
6. ### Statistics without individual subjects

Hi all My situation is that I'm going to run an experiment on food behavior. I have a canteen with a buffet available and I'm going to do a...

• Replies: 0
• Views: 1,034
01-28-2016, 05:43 AM
7. ### Inverse of the Standard Normal Cumulative Distribution Calculation

Hi Everyone, I'm trying to verify the calculation for the Inverse Cumulative Standard Normal Distribution Function represented by the Excel...

• Replies: 8
• Views: 7,707
10-02-2014, 10:39 AM
8. ### I need help!

Hi everyone, Here is my situation: I have never in my life taken a statistics course. I have an exam for a position with the state of CA on 10/18....

• Replies: 0
• Views: 1,874
10-16-2006, 03:53 PM
9. ### Comparing mean of 3 samples

Hi I wonder if anybody would be so kind as to help me with a problem. I am a paediatrician looking at weight change after 12 months of treatment...

• Replies: 5
• Views: 16,643
09-16-2008, 03:13 AM
10. ### Medical statistics

Hi I am a paediatrician looking at weight gain in children who take a particular drug for an inflammatory arthritis. (BMI = body mass index) ...

• Replies: 2
• Views: 4,249
09-20-2008, 12:48 AM
11. ### Stats Novice: Help finding if 1 value affects another

Apologies I have learning trouble and stats are a particularly weak point. Im doing research on 10 animals species, and their conservation status...

• Replies: 0
• Views: 831
04-30-2017, 01:05 PM
12. ### Confidence intervals on Binomially-distributed variable

I have some confusion about confidence intervals, which arose when working with a Binomially-distributed variable, so I will use that distribution to...

• Replies: 6
• Views: 1,896
10-26-2013, 09:13 AM
13. ### Simple question, i think

Hi I have several sets of data with ratings from 1-5 with 1 being the worst, 5 being the best. I am wondering what is the best/simplest way to...

• Replies: 4
• Views: 1,994
05-27-2009, 04:32 PM
14. ### Simple calculation needed, please

Hi, Have an easy one i think, just can't get my head around it. I have two sets of data, one set that is a likert scale from 1 to 5 and the other...

• Replies: 1
• Views: 1,932
09-18-2008, 12:58 PM
15. ### Backing out standard errors on regression betas from Least Significant Differences

I'm trying to do a meta-regression analysis on the effect of a certain treatment on crop yields. There are tons of papers reporting effects, and I...

• Replies: 2
• Views: 1,949
02-24-2012, 02:09 PM
16. ### Test for two groups in one sample

Hi All, I've been trying to find a test that would identify whether my sample is actually two separate groups as opposed to a normal group. I'm...

• Replies: 0
• Views: 1,347
08-24-2009, 09:17 PM
17. ### Significance between multiple groups

Hi Guys, I have an okay understanding of statistics but struggled with this one as it is not something I have done before, any help or pointers...

• Replies: 1
• Views: 1,095
12-30-2014, 08:58 AM
18. ### Help needed on Histogram

How do i find the median if the median falls in 2 different classes? e.g Range / Freq 0-200 / 0 200-400 / 25 400-500 / 15 500-600 / 5...

• Replies: 1
• Views: 2,534
12-16-2010, 01:52 PM
19. ### Which test?

I hope people can help. I have an ingredient supplier who wishes to use a calculated value on the CofA rather than a test value. We have an...

• Replies: 1
• Views: 1,936
06-26-2012, 07:04 AM
20. ### Hypothesis testing help

Can anyone help me with hypothesis testing? I am confused at how to approach these problems. An example of a problem I have is.... A single...

• Replies: 2
• Views: 2,548
11-26-2011, 02:38 PM
21. ### How to analyze a dependent variable which is an array?

Hello, In a sample of around 20 participants, each of them delivered 3 hierarchies (or arrays) produced by using 3 different approaches (A, B and...

• Replies: 3
• Views: 1,812
10-31-2011, 06:26 AM
22. ### minimum sample size for mean

Am I doing this right? :) I am trying to calculate the average value of a call to a non-profit call center by sampling the audio recordings. Each...

• Replies: 2
• Views: 6,017
12-27-2010, 04:56 PM
23. ### ikelihood

hello, I have a question about the topic ikelihood. In the literature, the likelihood function is used for the estimation of the parameters, and in...

• Replies: 1
• Views: 1,211
09-12-2016, 05:25 PM
24. ### Statistics question

Can someone help with these questions: 4. In a survey, some of the questions concern sensitive issues (e.g., income, drug use, sexual...

• Replies: 2
• Views: 2,647
ssd
12-12-2006, 12:45 PM
25. ### Partial correlation

Hey Can I use partial correlation in SPSS if my variables are violating normality of distribution? Thanks!

• Replies: 0
• Views: 1,456
07-07-2012, 10:42 AM
26. ### 2x2 repeated measures factorial design for non parametric data?

Hi I have a 2x2 repeated measures factorial design, variables: (length- short/long, complexity- low/high) resulting in four conditions. I have four...

• Replies: 0
• Views: 3,513
07-08-2012, 06:12 AM
27. ### Binary depedent variable in linear regression: need your helps!

y i =a+bD i +u i ,i=1,…,n (regression equation) Always thank you for your helps! I have a question about binary dependent variables in...

• Replies: 3
• Views: 1,769
10-12-2013, 10:02 AM
28. ### Comparing PCA to multiple regression.

Dear all, I would appreciate any help on this question. I have been asked to compare the results of PCA to multiple regression. I ve been given...

• Replies: 1
• Views: 1,000
01-13-2014, 10:56 PM
29. ### p-values from Monte-Carlo

I have data from two different groups and they both have 19 subjects. I find a statistical measure for the two groups and claim that one is greater...

• Replies: 11
• Views: 3,723
05-21-2008, 06:42 PM
30. ### Testing is a sample has been rigged??

Hello All, This is my first post so please be gentle, I did applied stats 22 years ago as part of my Physics degree but that was, well, 22 years...

• Replies: 3
• Views: 1,407
10-17-2014, 02:37 PM
31. ### Dissertation help

Hi - i have to analyse the data i have collected for my dissertation and was hoping someone could give me a pointer in the right direction. my...

• Replies: 6
• Views: 3,189
02-28-2008, 12:08 PM
32. ### Dummy variables and their interaction (urgent help required)

Dear All, I have a question concerning the dummy and dummy interactions. Firm Performance is a continuous variable (variable of interest) and...

• Replies: 3
• Views: 165
09-30-2017, 03:01 AM
33. ### Statistical power problem

I have been working on a statistics problem and I think I have worked it out but I would like someone to conform it. Problem An outcome has a 25%...

• Replies: 0
• Views: 3,056
01-16-2009, 04:18 PM
34. ### Are standard deviation and z scores distorted with small samples?

If the standard deviation of a coin toss is one based on heads +1 tails -1.using population standard deviation. That should give a z score of 1 for a...

• Replies: 4
• Views: 5,089
01-28-2009, 01:35 PM
35. ### Z- and T-Scores. Why bother?!

If anyone could help a complete statistical ignoramus out, it would be much appreciated: I am teaching a package for the Armed Forces which has...

• Replies: 1
• Views: 2,229
12-16-2009, 04:38 AM
36. ### Determine sample size and frequency for long term permanent monitoring monitoring

Hello, I have five years of annual plant count census data from 214 permanent sampling plots. These are complete counts of a single plant species...

• Replies: 0
• Views: 1,040
10-08-2015, 03:20 PM
37. ### Need to aggregate t-test stats

Here's the setup: My main goal is to "bless" a new database (db) such that "blessing" means that the new database isn't "statistically different"...

• Replies: 1
• Views: 2,969
12-28-2007, 07:00 AM
38. ### Creating a grouping variable

I am trying to create a grouping variable (1, 2, 3, or 4) from the median split of two other variables (job and life satisfaction). So the new...

• Replies: 4
• Views: 6,941
08-15-2007, 07:10 PM
39. ### temperature data test advice

Hi there What would be the correct test for the following situation. I have 3 temperature monitors measuring the air temperature in different...

• Replies: 0
• Views: 1,780
07-31-2012, 10:52 AM
40. ### half data is normal - transform for a t-test?

I have rainwater runoff retention data for a green roof and a concrete roof for 70 separate rain events. I want to compare them using a paired...

• Replies: 2
• Views: 1,466
12-28-2012, 09:47 AM
41. ### Species diversity index without count data

Hello I want to calculate plant species diversity (Shannon wiener index) for some land parcels that I have sampled but I dont have counts of...

• Replies: 0
• Views: 1,145
08-05-2014, 01:59 PM

Hi everyone. I am a new member of this great forum. I have some question sheets of my exam and I can't answer them. My exam will be taken on...

• Replies: 1
• Views: 548
07-09-2017, 04:54 PM
43. ### Transformations

I have two datasets, before and after the application of a treatment. The treatment is theorised to produce an increase in "factor x", and difference...

• Replies: 3
• Views: 3,461
12-09-2011, 01:51 PM
44. ### Bonferroni correction in GLMs

I'm running a series of General Linear Models, attempting to explain factor x with 6 other factors; individually, all 2-way and all 3-way. Due to...

• Replies: 1
• Views: 1,904
02-02-2012, 07:00 AM
45. ### GLM output

I am conducting a series of GLMs in order to find the minimum adequate model, the largest model in which all factors are significant. In some of my...

• Replies: 3
• Views: 2,842
02-07-2012, 06:44 AM
46. ### Interactive terms

Afternoon all, I've been running some GLMs using a stepwise backwards deletion routine (main effects, 2 way, 3 way), deleting the least...

• Replies: 1
• Views: 1,857
03-09-2012, 09:01 PM
47. ### I have an actual and estimated time series to compare - linear regression ok?

I'm pretty new to this but trying to figure out which estimated time series does a better job of predicting what the actuals are. I have two...

• Replies: 0
• Views: 1,009
02-23-2015, 11:01 PM
48. ### comparing score? wilcoxon signed rank test

hey guys a little bit of question from me about test used for comparing score my data is normally distribute but i use Wilcoxon to compare...

• Replies: 2
• Views: 1,320
02-06-2013, 11:44 AM

Hello I've produced a spreadsheet with the intention of forecasting the odds for soccer games in the Home,draw,away market (1X2). I produce...

• Replies: 2
• Views: 2,851
06-15-2010, 08:40 AM
50. ### Statistical Significance

What is it that makes a change statistically significant? Is this relationship solely based on whether the allowance is larger than the value being...

• Replies: 0
• Views: 2,734
07-26-2008, 10:55 PM
51. ### Standard Deviation of a Weighted Mean

Does anyone know how to calculate the standard deviation of a weighted mean? v p(v) 0 0.3 1 0.4 2 0.3 I need to calculate the...

• Replies: 6
• Views: 15,199
07-28-2008, 01:41 PM
52. ### Probability Question

I am having trouble with this question I don't really know how to go about it. Yesterday's production of refrigerator compressors got out of...

• Replies: 2
• Views: 2,010
07-27-2008, 12:56 PM
53. ### Anova Homework Problem

I have this homework that gives the mean of each of the treatments but no data with it. I just a little confused on how I would calculate the SStreat...

• Replies: 1
• Views: 2,775
11-17-2010, 12:28 AM

Page 15 of 294 First 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 65 115 ... Last

Use this control to limit the display of threads to those newer than the specified time frame.

Allows you to choose the data by which the thread list will be sorted.

Note: when sorting by date, 'descending order' will show the newest results first.