1. Announcement:
05-10-2017
Views:
1,894
Page 4 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 54 104 ... Last
Threads 181 to 240 of 17593

# 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: 197,089
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: 66,920
09-30-2005, 09:44 AM
1. ### 3-way vs 2-way ANOVA

I have done a 2-way ANOVA to check the impact of my 2 treatments (EXP, 2groups and INFO, 3 groups) on my dependent variable and got significant main...

• Replies: 0
• Views: 1,870
07-30-2012, 01:34 AM
2. ### 33- and 66-percentile in Prism Graphpad

Hi Any one who knows how I can do 33- or 66-precentile in Prism Graphpad? Or if there other easy way to do that in other programs? Thank you...

• Replies: 0
• Views: 1,003
11-21-2013, 02:29 PM
3. ### 3rd Quartile

HI, I need some help with this one please: X1,...Xn ~ N( mu, sigma^2 ) both mu=E(Xi) and sigma^2=Var(Xi) are unknown I need to find a...

• Replies: 5
• Views: 4,479
06-04-2009, 10:25 AM
4. ### 3SD Points

Hi Guys, Glad I found you, i am needing some advice. I havent used stats in I dont know how long but have been asked to provide a graph to 3SD. ...

• Replies: 6
• Views: 3,958
12-01-2006, 11:34 AM
5. ### 3SLS method

Dear members: I am reading a report on an econometric analysis that has been carried out for fish industry. I am not familiar with 3SLS. I...

• Replies: 0
• Views: 2,687
04-25-2007, 09:54 AM
6. ### 3x3 Grid to show relationship?

I have tried to create a model combining 2 social theories with 3 categories to form a 3x3 grid. I then created a survey with mainly used 5 point...

• Replies: 1
• Views: 5,232
10-04-2011, 11:32 AM
7. ### 3^2 factorial design, just one treatment with replicas, help?

Hello al! I would appreciate if you could help me, I have this experiment with two factors, every factor with 3 levels, so in total there are 9...

• Replies: 0
• Views: 825
12-11-2012, 08:25 AM
8. ### 4 continuous IVs predicting a single binary DV

Like the title says... I have 4 continuous IVs, whose combined effects (i.e. interactions possible) should predict a binary DV (possible values 1...

• Replies: 9
• Views: 2,024
12-14-2012, 07:44 PM
9. ### 4 Data Points and Estimate the Next

I have a problem that gives me 4 data points and a 5th that I should use to estimate. The 4 data points are revenue totals for prior years. I also...

• Replies: 0
• Views: 982
10-18-2013, 05:38 PM
10. ### 4 groups test - is it possible?

My problem - I have conducted an experiment which grows Water Cress in 6 different growing mediums (sand, gravel, stone, peat, compost,...

• Replies: 22
• Views: 4,622
03-10-2008, 11:31 AM
11. ### 4 sets of true/false data

I just need a hint .. I have 19 subjects, and I have performed 4 types of examinations on each of them - trying to measure the same parameter...

• Replies: 1
• Views: 1,530
02-26-2009, 03:13 AM
12. ### 4 times the same experiment with 4 conditions in each experiment: 2-way ANOVA?

I have run 4 times the same experiment and in each experiment I have the same 4 conditions. In each group, in each experiment, I have 3 to 5 mice. I...

• Replies: 2
• Views: 1,331
11-08-2012, 06:21 AM
13. ### 4 treatment types, four possible outcomes, and ran experiment 3 times

I am circling through choices of analyzing. I have a ran the experiment 3 times and the same similar numbers come up for each experiment. The...

• Replies: 0
• Views: 1,267
05-21-2014, 07:07 PM
14. ### 4 unbalanced groups. Bonferroni/Tukey with proc glm okay to compare means?

The data is right skewed (all groups). Need to compare means. 3 groups have 300 observations each but the 4th group has only 100. Will a proc glm...

• Replies: 12
• Views: 4,296
03-31-2012, 04:37 PM

hi :wave: i have 2 surveys. The data is collected from both managers and subordinates, the first one has just one variable (moderator) and the 2nd...

• Replies: 2
• Views: 1,529
09-19-2014, 07:18 PM
16. ### 4 Vowel Intensities, Amplitude Spectrum of EEG - Multiple Logistic Regression?

I have EEG recordings of the neural response to speech (a male vowel with a fundamental frequency of 100Hz). The vowel was presented to each subject...

• Replies: 0
• Views: 812
02-05-2014, 02:39 PM
17. ### 4th-variance?

Hello any and all, I am no statistician so does the term "4th-variance" mean anything to someone? I am attempting to replicate the technique found...

• Replies: 0
• Views: 1,647
03-24-2014, 01:49 PM
18. ### 5 factor, 3 level experimental design

Hello all, firstly I would like to thank in advance anybody who is able to help me with my problem. I am having trouble in finding the correct...

• Replies: 0
• Views: 4,437
08-25-2009, 09:55 AM
19. ### 5 Step Hypothesis Testing

I am taking this course through distance education and Hypothesis testing has been hard to learn on my own. Please help me show the 5 steps to find a...

• Replies: 3
• Views: 4,745
11-26-2006, 06:09 PM
20. ### 5% vs 10% significance level

For hypothesis testing which one is considered stricter 5% significance level or 10% significance level. I know its a very basic question but it...

• Replies: 6
• Views: 34,796
07-21-2012, 03:13 PM
21. ### 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...

• Replies: 2
• Views: 6,856
03-18-2008, 03:34 AM
22. ### 50\$\$\$ to the person who can help me answer 3 questions.

willing to paypal 50\$\$\$ to the person who can help me answer 3 questions. :) 1, The mean weight of 9 randomly selected 5 years old boys babies...

• Replies: 31
• Views: 7,638
02-08-2012, 08:55 AM
23. ### 6 Degrees in Social Media

I believe this is a statistics question. Does anyone know how many Facebook fans you have to have until a random user registering with Facebook...

• Replies: 0
• Views: 2,230
10-25-2010, 06:10 PM
24. ### 6 out of 6

Anyone buy this argument? Thoughts? I'd like some way to write it up and this is my best shot .... A certain validation procedure requires a...

• Replies: 15
• Views: 4,228
02-02-2012, 01:04 AM
25. ### 6 Ways to Address Collinearity in Regression Models

Recently came across this article regarding dealing with Collinearity. Does anyone have an opinion on what is the best method? ...

• Replies: 0
• Views: 793
09-08-2013, 03:36 PM
26. ### 6 Widget Producing Machines - How often one machine produces the most/above average

I'm looking to be able to calculate (not simulate) how often a sample from one distribution exceeds the sample of multiple other distributions. I am...

• Replies: 3
• Views: 1,553
09-24-2015, 11:33 AM
27. ### 68-95-99.7 rule

I have finally figured out the standard deviation and think I am getting the hang of distribution on a bell-shaped curve. What I don't understand...

• Replies: 7
• Views: 5,823
09-27-2010, 12:39 PM
28. ### 76 percent per 1,000 women aged 15-19, U.S

Hello everyone, I am mathematically and statically challenged beyond belief. So, please riddle me this: If you look at the first paragraph of...

• Replies: 4
• Views: 1,649
10-18-2012, 03:12 PM
29. ### 80% configence interval

Hi all, Question: In a report on why e-shoppers abandon their online sale transactions, a study found that “pages took me much time to load”...

• Replies: 2
• Views: 4,009
11-13-2010, 09:14 AM
30. ### 82% Confidence Interval

Over the last 15 Major League Baseball seasons, the mean # of strikeouts by the American League leader is 258.5. Assuming that the # of strikeouts by...

• Replies: 2
• Views: 22,770
06-22-2008, 08:40 PM
31. ### 90% Confidence Problem

This is the question I am struggling with, it is from a set of practice questions but I am trying to understand how to do this for my upcoming exams,...

• Replies: 1
• Views: 226
09-25-2017, 02:38 PM
32. ### 90% VS 99% Confidence Interval

To create confidence intervals using the normal distribution, if the area alpha/2 is not in the table and it is exactly in between two areas, should...

• Replies: 3
• Views: 1,088
03-01-2016, 10:29 AM
33. ### 95 % confidence region of F distribution

Hi Dear, I have to determine the 95 per cent confidence region of my best fitting model from a table that follow an F-distribution. The table look...

• Replies: 0
• Views: 2,911
08-30-2011, 03:42 AM
34. ### 95% CI- correct for uncertainty?

Here is a tricky question (at least for me). Let's say I'm observing that 100/2000 samples tested with test A are positive for virus X. But as this...

• Replies: 0
• Views: 1,568
Jka
12-05-2013, 05:46 AM
35. ### 95% confidence interval

I'm not sure how to construct a 95% confidence interval for a one tailed test. I know that for a two tailed test, it's just the critical value...

• Replies: 1
• Views: 3,046
03-03-2006, 03:13 PM
36. ### 95% confidence interval

Hey all, I finished studying a whole chapter on confidence interval and was feeling happy to be finally able to answer most of the questions at...

• Replies: 2
• Views: 3,161
11-01-2010, 06:48 PM
37. ### 95% confidence interval help

How much money does the average professional football fan spend on food at a single football game? That question was posed to ten randomly selected...

• Replies: 8
• Views: 9,155
10-25-2006, 09:36 PM
38. ### 95% Confidence Intervals

Hey, I've been searching the web frantically for the last hour trying to find out how you calculate the 95% CI for a 2x2 Within Group ANOVA and a...

• Replies: 2
• Views: 1,243
03-29-2014, 06:59 PM
39. ### 95% confidence range

Hi all, I have a fairly limited background in statistics and am stuck and confused by a question on a homework assignment. We are given a list of...

• Replies: 0
• Views: 3,351
02-13-2012, 06:26 PM
40. ### 99% confidence interval

I have worked on this problem for awhile trying it different ways - A random sample of 250 students at a university finds that these students take...

• Replies: 1
• Views: 8,551
04-13-2010, 10:30 AM
41. ### 99% Confidence Interval + Last question, I really need help please

A random sample of 200 individuals working in a large city indicated that 50 are dissatisfied with their working conditions. Based upon this, compute...

• Replies: 1
• Views: 2,456
03-25-2008, 06:05 PM
42. ### :( help

im wondering if anyone can help me with 2 questions i have. A tire claims that the tires of its tires are normally distrubuted and will last an...

• Replies: 2
• Views: 2,150
02-06-2011, 06:45 PM
43. ### :confused: HELP!!!!

I don't know how to start. I just really need to be pointed in the right direction: Question: Alana, Barry, and Cyndi have each applied for...

• Replies: 2
• Views: 2,243
11-26-2008, 08:53 AM
44. ### ? paired sample comparisons

My question about paired sample comparisons is about finding the difference in the data between collum A and collum B. What I would like to know is...

• Replies: 2
• Views: 2,572
10-22-2008, 07:15 AM
45. ### ?Test for consistency and showing trend/pattern

Hi I need help with the following experiment. I am measuring 3 parameters from a few subjects n=6, say they are measurement A, B and C. ...

• Replies: 0
• Views: 2,386
04-26-2010, 05:04 AM
46. ### A (probably very basic) question...

Hello, Sorry if this is not the correct place to post this. I have a binomial stats question that I just cannot get to grips with at all and I'm...

• Replies: 3
• Views: 2,823
01-02-2017, 02:56 AM
47. ### A basic question on stochastic processes and stopping times

• Replies: 0
• Views: 1,742
12-02-2010, 07:37 PM
48. ### A basic question with no concrete solutions out there

Hi AFAK multiple comparisons need fixing the type I error rate, either by correcting the level of significance, or modifying the calculated P. ...

• Replies: 1
• Views: 4,269
10-26-2011, 06:38 AM
49. ### A basketball team problem

• Replies: 1
• Views: 4,703
11-23-2005, 12:14 AM
50. ### A bayesian statistics question

I have a question im trying to work through, but im not too sure how to start it off. the question is related to scientists studying populations of...

• Replies: 6
• Views: 1,104
09-08-2012, 06:40 PM
51. ### A big problem for smart people

I have two possibilities; X1 and X2. The question is: If you know that X1 gives you 0 then what does X2 give you? I set up a table: ...

• Replies: 0
• Views: 9,999
09-25-2009, 02:03 PM
52. ### A binomial toughie

Hi guys, could someone people help me with this hard problem? I read fundamentals of biostatistics by posner (revelant sections), did some google...

• Replies: 0
• Views: 991
04-14-2013, 02:12 AM
53. ### A biomedical experiment problem

Dear people, I am currently doing a biomedical study where there are 4 different treatment. Sham operation, A, B and (A+B). Each treatment have...

• Replies: 3
• Views: 2,265
03-06-2006, 09:13 PM
54. ### A bit basic but....Help!

Honestly this problem put me into a stump. I'm used t having set of data values, but now I'm just confused on this. I am just starting statistics so...

• Replies: 1
• Views: 3,269
05-06-2013, 06:48 PM
55. ### A bit confused on confidence intervals

Why does the t-value for the 98% confidence interval increase to 2.33 from 1.96? Basically what determines these values and what does it mean?

• Replies: 3
• Views: 1,775
10-15-2012, 03:19 PM
56. ### a book which introduce neural network?

Dear all, I am currently working on model specification for neural networks and so look for a book which introduces neural networks including...

• Replies: 0
• Views: 938
04-15-2015, 10:23 PM

The same supervisor wanted to be certain that the group without Flextime would be affected the same way so the following week she introducted it to...

• Replies: 0
• Views: 1,677
07-20-2007, 03:14 PM

A supervisor wants to determine whether flextime will affect production so she selects a group of 20 employees, randomly assigns them to either...

• Replies: 0
• Views: 1,828
07-20-2007, 03:08 PM

Page 4 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 54 104 ... 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.