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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: 200,351
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: 68,570
09-30-2005, 09:44 AM
1. ### Simultaneous Hypothesis Tests

Hi, this is my first post here, so I hope this is the right place to write it. I was wondering how can I test these hypothesis simultaneously: ...

• Replies: 7
• Views: 4,093
11-18-2005, 07:49 PM
2. ### repeated measures

Which analysis is appropriate if you have repeated measures of continous explanatory variables and one measure of a continuous outcome variable?

• Replies: 3
• Views: 3,498
11-17-2005, 07:54 PM
3. ### Sequential tests and Type II error

I am performing a series of sequential hypothesis tests. I'm using the Bonferroni inequality, and a global alpha, to calculate alpha for each of the...

• Replies: 2
• Views: 2,875
11-16-2005, 11:48 PM
4. ### anova

can anova be used for for multiple comparisons? will it be significant? also is the dunnett test more powerful than the Tukey and Newman Keuls?...

• Replies: 1
• Views: 3,150
11-16-2005, 12:06 PM
5. ### ANOVA ques----can someone help?

Got a question about variances, am very new to stats

• Replies: 3
• Views: 3,401
11-15-2005, 09:29 PM
6. ### Statistics and stock market

does statistics help you at all when investing your money and analyzing a certain stock or mutual fund..?

• Replies: 3
• Views: 4,973
11-15-2005, 05:11 PM
7. ### Employee Performance Project Help

Hello all, I have a project I'm working on and I need some advice. I have only a very basic knowledge of stats. Here goes... Your company has a...

• Replies: 10
• Views: 4,830
11-13-2005, 08:20 PM
8. ### lost about locating info.

:confused: I would appreciate any help on locating specific examples where businesses can effectively use statiscal tools. I have found great...

• Replies: 2
• Views: 3,249
11-13-2005, 03:45 PM
9. ### Confidence Interval Estimation

Hello everyone. I have a question that I am stuck with. I have no idea if I am on the right track here. I have a series of questions like the one...

• Replies: 5
• Views: 5,001
11-13-2005, 10:30 AM
10. ### Continuous variables for correlations

Hello, I hope someone can help me with this question. If my variable is categorical (1=Sometimes, 2=Frequently ...) can I use it for in a...

• Replies: 2
• Views: 3,311
11-12-2005, 05:37 PM
11. ### election statistics question

looking at the new jersey 2005 election... i want to see if counties with a higher percentage of "over 65" people correlate to either a higher dem...

• Replies: 1
• Views: 4,187
11-11-2005, 01:14 PM
12. ### Regression question

I am just beginning to learn about regression and I have a couple of questions. What is the difference in the standardized regression coefficient...

• Replies: 2
• Views: 4,890
11-11-2005, 01:03 PM
13. ### help! null/alternative hypothesis?

QUESTION: If we are interested in testing whether the mean of population 1 is smaller than the mean of population 2 how would you state the null...

• Replies: 1
• Views: 6,327
11-10-2005, 11:08 PM
14. ### confidence intervals

I have a question that is driving me up the wall. A sample of size 400 has a (sum)x = 30,430 and (sum)xsquared = 3,261,1000. construct a 95%...

• Replies: 4
• Views: 4,365
11-09-2005, 10:33 PM
15. ### paired t-test assumptions

I know this test is used for two groups and involves a normally distributed, continuous variable--and it involves the difference in means. Does the...

• Replies: 5
• Views: 6,306
11-09-2005, 12:04 AM
16. ### Continuous Probability Distribution

I tried reading and understanding continuous probabs distrib but i couldnt relate it to integration well pls can u help me right from the basics...

• Replies: 1
• Views: 3,876
11-05-2005, 02:37 PM
17. ### Help

My question is: Find the critical value Chi squared R corresponding to a sample size of 3 and a confidence level of 95 percent. I know that...

• Replies: 3
• Views: 9,730
11-04-2005, 05:25 PM
18. ### What stats to use?

Hi everyone, iam doing a project on fish catches and i was wondering if there was any stats i could use. iam looking at catches (both net and rod)...

• Replies: 2
• Views: 3,332
11-04-2005, 11:46 AM
19. ### seems all too easy

:D okay, I have bought my 68 average in stats up to a 76, We are currently studying Confidence Interval stuff and hypothesis testing. The teacher...

• Replies: 1
• Views: 4,238
11-03-2005, 09:42 PM
20. ### I Need Help

All, I am struggling with Statistics in all areas. I'm great with numbers, however, I'm lost with this. Can someone help? Here are the following...

• Replies: 6
• Views: 10,673
11-03-2005, 12:41 PM
21. ### Check my stats? How do I make a ratio that accommodates variability?

Hi, I'm a newbie which a problem:confused: I have two sets of data: A and B. Each is represented by a mean and a standard deviation. I want to...

• Replies: 3
• Views: 5,261
11-02-2005, 11:51 AM
22. ### Parsimonious regression model

Hi, I am trying to finish an assignment and I am stumped on one question. It is asking me to build a valid parsimonious regression model. What do...

• Replies: 1
• Views: 39,390
11-02-2005, 09:09 AM
23. ### chi squared

I need to find the best type of analysis to compare whether people who say they would use a product are influenced by a characteristic. I have data...

• Replies: 2
• Views: 5,013
11-02-2005, 04:25 AM
24. ### it's me again, need some help, thanks

:D Ok. I think I have it, but my answer does not quite match up. ??? A RECENT POLL OF 700 PPL. WHO WORK INDOORS FOUND THAT 278 OF THEM SMOKE....

• Replies: 1
• Views: 9,316
11-01-2005, 09:56 PM
25. ### Determine Sample Size

I'm not sure what direction to go with this problem. I'm given 2 random samples: 1. 120 men, mean age 26.7, standard deviation 5.2yrs 2. 150...

• Replies: 2
• Views: 4,883
10-31-2005, 08:39 PM

This my first posting. The Bank wants to estimate the mean dollars that each card holder will spend each month. It would like to be within plus...

• Replies: 3
• Views: 4,497
10-30-2005, 06:52 PM

I need help with my statistics coursework and it has to be handed in 2morrow! i need to do spearmans rank of coefficient correlation on some data but...

• Replies: 1
• Views: 3,027
10-30-2005, 02:55 PM
28. ### approximation

Could someone tell me how iH was approximated from the equation at the top? Which approximation rule was used?

• Replies: 2
• Views: 3,161
10-30-2005, 09:29 AM
29. ### Help- Am Lost!

if you can do this you are a star and better than me. have just finished 34 other questions and this one has stumped me totally! The set of scores...

• Replies: 1
• Views: 3,988
10-28-2005, 03:05 PM
30. ### HIGH LEVEL STATS:Can u help?

Hi, I am strugglig with some questions- I hope that someone will be able to help??? 1. Describe the relationship of the mEan, Median, and MOde to a...

• Replies: 2
• Views: 4,158
10-28-2005, 02:04 PM
31. ### regression

hi i have a doubt over something.. what is the standard error of the slope for regression and the standard error of the intercept. and what does...

• Replies: 1
• Views: 3,394
10-25-2005, 09:05 PM
32. ### hypothesis - need help

Where are the statical symbols to put in the problems?

• Replies: 3
• Views: 3,788
10-24-2005, 07:54 PM
33. ### nonparametric stats

Hi, I'm a grad student reading up on nonparametric stats. I have a basic question. Are techniques such as local regression and smoothing splines...

• Replies: 2
• Views: 3,496
10-24-2005, 06:40 PM
34. ### help

Honestly I have no idea how to do these I dont even know where to start please help In the past, of all the students enrolled in “Basic Business...

• Replies: 1
• Views: 4,368
10-20-2005, 03:37 PM
35. ### least squares method

Has anyone ever heard of using this?? It has to do with the regression equation... pllllllllease explain with lots of detail. statistics is not...

• Replies: 2
• Views: 3,926
10-20-2005, 03:02 AM
36. ### ANOVA's

Is it possible for someone to tell me how to do them?

• Replies: 2
• Views: 3,507
10-17-2005, 09:48 PM

• Replies: 1
• Views: 3,394
10-17-2005, 01:51 PM
38. ### Z values

hey i was wondering when calculating proportions of a normal distribution and they ask you what is the probability of selecting something between 60...

• Replies: 2
• Views: 4,062
10-16-2005, 08:44 PM
39. ### Computing Power

I know that power is one minus beta...but how do you calculate beta?

• Replies: 15
• Views: 7,549
10-12-2005, 11:25 PM
40. ### statistics

hi, i was wondering if it was better to use log-transformed data or untransformed data when making comparisons between two groups. also should we...

• Replies: 2
• Views: 3,154
10-11-2005, 06:55 PM
41. ### sample mean

The population of incomes in a particular community is thought to be highly right-skewed with a mean equal to \$36,789 and standard deviation equal to...

• Replies: 2
• Views: 4,895
10-09-2005, 06:38 PM
42. ### Probability of a Mailing Machine

I need some real serious help. This is the problem I need to finish. A technician services mailing machines at companies in the Phoenix area....

• Replies: 4
• Views: 10,573
10-09-2005, 05:53 PM
43. ### Distribution free confidence interval

How would I work out a distribution free 95% confidence interval of the median if given a large sample? To get the 95% CI I use \mbox{estimate}...

• Replies: 1
• Views: 4,687
10-08-2005, 09:09 AM

:confused: I recently began this much dreaded course. I am having a difficult time grasping the concepts. I have an exam on Monday September 26,...

• Replies: 11
• Views: 6,404
10-08-2005, 06:15 AM
45. ### Maximum Likelihood Estimate

I need to find the ML-estimate of theta. The likelihood function I got is To get the ML-estimate, I believe I need to simplify, take logs,...

• Replies: 4
• Views: 4,113
10-08-2005, 06:08 AM
46. ### Confused

I have no problems figuring out the normal distribution and z score for problems within the range but my teacher threw out a question with one out of...

• Replies: 2
• Views: 4,512
10-06-2005, 05:37 PM
47. ### Help Me!!!!

I have a homework mini assignment and im finding statistics very hard! Can somebody please help me figure out what to use and why for the following...

• Replies: 6
• Views: 4,186
10-05-2005, 09:36 AM
48. ### Confidence Interval

what is the relationship between the confidence level and the size of the interval?

• Replies: 1
• Views: 3,742
10-04-2005, 10:31 PM
49. ### statistics

How and why does a one-tailed compared to a two-tailed test one affect the ability to identify significant differences?

• Replies: 2
• Views: 5,760
10-04-2005, 10:05 PM

hi to all , please help in stas , iam so stuck withit. i have assignment , but only 1 questions i need your help: (briefly explain) Q1: one of the...

• Replies: 2
• Views: 5,331
09-29-2005, 06:43 AM
51. ### Statistics --- help

can some one describe how standard error of the mean differs for a population and for sample?

• Replies: 1
• Views: 3,712
09-26-2005, 04:46 PM
52. ### stats

ive posted a clearer message ahead

• Replies: 1
• Views: 3,301
09-26-2005, 12:48 PM
53. ### Help with normal distribution

Hi All! I'm new to this forum and found it after spending 2 hours doing statistics homework. I'm trying to find an example, online, of the normal...

• Replies: 2
• Views: 3,968
09-26-2005, 12:00 PM
54. ### standard deviation

If you have a random sample of 100 in a population and it has some SD and then you do another sample, this time of 300, what happens to the SD, and...

• Replies: 6
• Views: 4,947
09-25-2005, 03:18 PM
55. ### Hypothesis Testing

I have this homework problem that I need assistance with. A package-filling device is set to fill jars of jelly with a mean weight of 16 ounces of...

• Replies: 3
• Views: 3,596
09-22-2005, 01:16 PM
56. ### please stat problem help

2 questions.... 1. Suppose that the distribution of annual salaries for sales associates at this store is bell-shaped. Use the empirical rule to...

• Replies: 1
• Views: 6,528
09-18-2005, 11:37 PM

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