1. Announcement:
05-10-2017
Views:
1,852
Page 287 of 294 First ... 187 237 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 Last
Threads 17161 to 17220 of 17588

# 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: 196,787
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: 66,774
09-30-2005, 09:44 AM
1. ### Large Sample Tests

I need help with this question. Can anyone help explain how the answers below were obtained. Thanks in advance. The frequency distribution of...

• Replies: 0
• Views: 2,518
05-30-2006, 01:47 PM
2. ### Confused on Exponential PDF

Hi, I am a bit confused on the Exponential prob density function. I am clear on a simple problem involving a poisson arrival mechanism and how to...

• Replies: 0
• Views: 2,002
05-30-2006, 01:07 AM
3. ### Hypothesis Testing Problem

Hi again. I have a quick question regarding hypothesis testing. Below is the question that I'm working on: On a national standardized reading...

• Replies: 3
• Views: 7,091
05-29-2006, 09:13 AM
4. ### Confused on Exponential PDF

Hi, I am a bit confused on the Exponential prob density function. I am clear on a simple problem involving a poisson arrival mechanism and how to...

• Replies: 0
• Views: 1,857
05-28-2006, 04:13 AM
5. ### transformations of explanatory variable

If you look at the residuals for some response variable y regressed on some explanatory variable x and you see some pattern, e.g. the residuals seem...

• Replies: 0
• Views: 3,296
05-28-2006, 12:55 AM
6. ### Question about multivariate regression results

I'm a PhD candidate working with my dissertation data in organizational theory. I'm having trouble understanding my data results and have a few...

• Replies: 0
• Views: 2,503
05-24-2006, 01:45 PM
7. ### Analysis of three difference samples

Hi there, I have surveyed three separate populations frome which I have obtained fairly representative samples. One was a stratified sample (as...

• Replies: 0
• Views: 1,924
max
05-24-2006, 04:30 AM
8. ### errors??

hi there!!:wave: i have a question!im completely getting confused, what is the difference between error term, error variance, experimetal...

• Replies: 0
• Views: 2,007
05-23-2006, 02:44 PM
9. ### z or t Argggggggg

Among trained typists, suppose the average typing speed on an electric typewriter is 60 words per minute (wpm), with a standard deviation of 5 wpm....

• Replies: 2
• Views: 1,865
05-23-2006, 08:27 AM
10. ### 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...

• Replies: 3
• Views: 3,190
05-23-2006, 08:18 AM
11. ### determining mean without Z score

Hello, Not looking for the answer, I've just got myself confused. The scenario I have is: I have been given the Standard deviation figure 14.62...

• Replies: 4
• Views: 2,900
05-22-2006, 09:02 PM
12. ### Can somebody check this one two

If the mean life of an aircraft engine part is 510 hours and the standard deviation is 30 hours, what percentage of parts lasts no more than 462...

• Replies: 4
• Views: 2,844
05-22-2006, 05:45 AM
13. ### Kind of embarrasing

Question A study discovered that that income of students is normally distributed, with an average annual income of \$17,500, and a standard deviation...

• Replies: 3
• Views: 2,777
05-22-2006, 05:44 AM
14. ### population proportions...

Hello, Suppose you have a problem to solve in which 71% of Internet users connect using standard telephone lines. The population proportion is...

• Replies: 3
• Views: 1,793
05-21-2006, 10:11 PM
15. ### poisson distribution

hello there, I've been staring at this question for quite some time now but to no avail :( "The discrete random variable X has a truncated...

• Replies: 0
• Views: 1,705
05-21-2006, 03:41 PM
16. ### hypothesis tests

im really bad with these kind of questions regarding null/alternative hypotheses and the probability of them being true/rejected does any one have...

• Replies: 1
• Views: 2,193
05-21-2006, 03:10 PM
17. ### comparing likert data scores

Hi...I don't know why this question is so hard to find an answer on. I have a simple situation. I created a questionnaire with 6 point likert answers...

• Replies: 3
• Views: 6,789
05-21-2006, 02:07 PM
18. ### Correlation between groups

Hie, I would like to run correlation between my dependent (behaviors) and independent (stressors) variables. I have 10 variables for Behavior, and...

• Replies: 3
• Views: 2,406
05-20-2006, 08:01 AM
19. ### probability distribution Q

A player rolls two dice and is awarded 1 point if the same number appears on the upface of both dice. If different numbers appear, he gets no points....

• Replies: 6
• Views: 2,969
05-19-2006, 10:10 PM
20. ### 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 ...

• Replies: 1
• Views: 2,427
05-19-2006, 01:45 PM
21. ### How to compare multiple groups with multiple covariates?

Hello, Suppose you have a data set comprising 10 cases of 3 classes and 15 features (no assumptions about the distribution of the 15 features). ...

• Replies: 2
• Views: 2,790
05-17-2006, 04:26 AM
22. ### Homegeneity Tests

Hie, This question is regarding the assumption for ANOVA on having the variances equal for all populations. Have read that if this assumption is...

• Replies: 1
• Views: 1,882
05-16-2006, 07:21 PM
23. ### f test!

In analysis of varience. whay we use mostly single tailed,one tailed f test.why dont we use the two tailed. and under which konditions we use the...

• Replies: 1
• Views: 1,903
05-16-2006, 06:53 PM
24. ### stats terminology

hey can some confirm if my answers to this question is correct? thanks Classify the following variables as either quantitative or qualitative,...

• Replies: 1
• Views: 2,266
05-16-2006, 03:00 PM
25. ### continuous random variables

how would i compute the answer to the following question: Scores on a particular test are normally distributed in the population with a mean of...

• Replies: 1
• Views: 2,343
05-16-2006, 02:28 PM
26. ### Report Statistics

I need help finding a statistic that can be used on a daily production report I produce at work. Here's the info I have: Daily Budgeted/Expected...

• Replies: 2
• Views: 2,652
JDC
05-16-2006, 11:42 AM
27. ### correlation question

I have a question regarding a simple correlation of estimated rather than known values. Let’s say I am interested in the correlation between A and...

• Replies: 1
• Views: 2,220
05-16-2006, 11:34 AM
28. ### Hypothesis Test Writing

I am trying to remember the correct way to write hypotheses, as I am a bit out of practice. I am conducting bivariate analysis on variables...

• Replies: 2
• Views: 2,158
05-14-2006, 06:16 PM
29. ### Multivariate analysis for categorical dependent

Hi all, I have a question about multivariate analysis. I'm using SPSS 12. My dataset includes two variables, "cT_stage" (1,2,3,or 4) and...

• Replies: 1
• Views: 4,075
05-14-2006, 05:47 PM
30. ### Determing Z score from level of confidence

How can I determine the Z score, given a level of confidence of 65%. My math book has the z score for .80, .90, .95, and .99 but none other. ...

• Replies: 1
• Views: 36,752
05-14-2006, 10:03 AM
31. ### mean, mode, mediam

Hello, I have a question about mean, mode, and median is it possible to compute them using a date? example.. 29 Apr 2006 Thank you for your...

• Replies: 3
• Views: 2,906
05-13-2006, 10:38 PM
32. ### Trying to fit normal dist. to quartile data

I have taken a test to get into graduate school and have scored a 160. The range of scores is 120 to 180. The school I have applied to has...

• Replies: 3
• Views: 3,043
05-13-2006, 10:35 AM
33. ### median test or 2 sample kolmogorov test ?

Hi I have the following problem: My data is generally non normal distributed and therefore I use the 2 sample Mann Whitney Test for comparisons. ...

• Replies: 0
• Views: 2,915
05-13-2006, 07:27 AM
34. ### What test do I use?

hi john i am trying to work out what inferential test i should use on my data. in brief my study involves looking at the effectiveness of a...

• Replies: 0
• Views: 2,257
05-13-2006, 05:59 AM
35. ### Sample Size

Would like to learn the correct technique to caculate sample sizes. We are working with truck tires and determining the number of miles we get from...

• Replies: 4
• Views: 3,106
05-13-2006, 05:34 AM
36. ### R value Anova

Hi all can someone tell me when we are assessing the significance vlaue in ANOVA, do we measure it against the adjusted R value provided at the...

• Replies: 8
• Views: 3,899
05-12-2006, 09:16 AM
37. ### Trouble with Hypothesis testing (Psych. Stats)

I'm still really sketchy on hypothesis testing, even after reading the chapter in my book twice and watching the video lecture for this topic twice. ...

• Replies: 2
• Views: 2,754
05-11-2006, 03:56 PM
38. ### T-test and Z-test won't work

How can I solve this problem? X brand of batterys have a mean charge lasting time of 90 minutes and a standard deviation is 35 minutes but are not...

• Replies: 1
• Views: 2,726
05-11-2006, 09:14 AM
39. ### appropiate post hoc test

Hi May someone help me with this? I have done a 2 factor univariate ANOVA, although some of my data is not still normally distributed (Kolmogorov...

• Replies: 1
• Views: 3,306
05-10-2006, 03:38 PM
40. ### Normal Distribution Curve

I just want to make sure I am getting this right. 0.0<z<2.85 .5000-.4978 =.0022 so I would shade in to the right of the curve. -1.38<z<0...

• Replies: 7
• Views: 7,332
05-10-2006, 11:24 AM
41. ### Type 1 error

10 10 Α= P(Type 1 error)= P(x≥6In=10, p1/3)= E C (1/3)x(2/3)^(10-6) X=6 x How...

• Replies: 4
• Views: 2,761
05-09-2006, 08:09 PM
42. ### 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...

• Replies: 3
• Views: 3,859
05-09-2006, 08:08 PM
43. ### When to use Z scores or t scores?

Hi everyone, I have lots of trouble with Z scores and t scores........A lot of times we are given the standard deviation; however, the question...

• Replies: 3
• Views: 67,029
05-09-2006, 06:35 PM
44. ### Two Sample T-Test With Unequal Variables

I need to perform an independent samples t-test with unequal variables on these two sample sets. There are 30 samples in each. So far, I've come up...

• Replies: 3
• Views: 3,975
05-09-2006, 10:29 AM
45. ### Kurtosis

Hi! In LISREL, which values are we to use when discussing kurtosis, z-values or statistical values? Also, what are the difference between them? ...

• Replies: 0
• Views: 3,298
05-09-2006, 04:50 AM
46. ### Help - questions re: Empirical Rule/Chebyshev

Hello: Does anyone know how to approach these problems? Any help would be greatly appreciated. The mean IQ of 200 patients in a psychiatric...

• Replies: 5
• Views: 8,412
05-08-2006, 08:34 AM
47. ### ANOVA help!

Can anyone help with the analyses of the ANOVA output from SPSS. My thesis ihas a two tailed hypothesis and the ANOVA has produced the F values and...

• Replies: 1
• Views: 1,966
05-07-2006, 08:14 AM
48. ### Frequency Distribution & Polygons

Hi there, I just started a course in stats for the behavioral sciences, and I'm having trouble with one of my assignments. The assignment is to...

• Replies: 2
• Views: 2,082
05-06-2006, 04:39 PM
49. ### Distribution NOT normal :-(

I am conducting a repeated measure ANOVA and am testing the assumptions. My histograms are not showing a normal distribution for 2 of the 3...

• Replies: 1
• Views: 1,855
05-06-2006, 01:39 PM
50. ### How to determine whether it is a good sample group and others

Hello, I have some questions. I am going to collect 60 samples for my study. The samples' moisture contents are between 20 - 80 % 1. What...

• Replies: 1
• Views: 1,485
05-04-2006, 02:38 PM
51. ### Help with simple Confidence Interval Q

I just don't understand how to do these, I'm sure they are pretty simple. Any help would be greatly appreciated. A random sample of 120 passengers...

• Replies: 7
• Views: 2,319
05-04-2006, 01:24 PM
52. ### Fischer Table?

Hello all! I am currently working on a paper in finance. I have lost my statistics book. I would like to have a website with a Fischer table or...

• Replies: 7
• Views: 2,830
05-04-2006, 12:10 PM
53. ### Zscores and grouped data.

Hi, I have a set of data in the form of a frequency distribution. I have the class sizes and the corresponding frequencies but no access to the...

• Replies: 3
• Views: 2,683
mjc
05-04-2006, 10:17 AM
54. ### Analysis of correctness of answers

Hi! I have another question. My participants had to perform 32 tasks (8 tasks in all four conditions), and now I want to analyse whether there are...

• Replies: 1
• Views: 2,124
05-02-2006, 11:06 AM
55. ### how large the sample size should be?

Hi, I'm measuring electrical data from a clock generator and needs to know the std. dev. of period times (or frequency) for the lab report. I...

• Replies: 2
• Views: 2,482
05-01-2006, 02:33 AM
56. ### Nominal/Ordinal scale variables and analysis

Hi, I’m a student in need of some help. I have developed a questionnaire with Likert type scales to measure the attitudes of employees in relation to...

• Replies: 1
• Views: 6,314
04-30-2006, 01:40 PM

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.