Posted by **Anonymous** on Tuesday, December 7, 2010 at 1:35pm.

. Do students at various universities differ in how sociable they are? Twenty-five

students were randomly selected from each of three universities in a region and

were asked to report on the amount of time they spent socializing each day with

other students. The result for University X was a mean of 5 hours and an estimated

population variance of 2 hours; for University Y, ; and for University

Z, . What should you conclude? Use the .05 level.

(a) Use the steps of hypothesis testing, (b) figure the effect size for the study;

and (c) explain your answers to parts (a) and (b) to someone who has never had

a course in statistics.

- statistics -
**MathGuru**, Wednesday, December 8, 2010 at 10:25pm
Here are a few hints:

Check out a one-way ANOVA for this kind of problem. Do the calculations to find the F-ratio to compare to the critical or cutoff value from the F-distribution table (used for ANOVA tests). Find the critical or cutoff value at .05 level of significance using the table to reject the null hypothesis (which would state that all population means are equal). If the null is rejected in favor of the alternate hypothesis (which would state that all population means are not equal), then you can conclude a difference.

## Answer this Question

## Related Questions

- college - Do students at various universities differ in how sociable they are? ...
- statistics - Do students at various universities differ in how sociable they are...
- statistics - Do students at various universities differ in how sociable they are...
- College statistics - Do students at various universities differ in how sociable ...
- Psychology/Statistics - Do students at various universities differ in how ...
- statitics - 17. Do students at various universities differ in how sociable they ...
- probability and statistics - Chapter 9: 17. Do students at various universities ...
- statistical psychology - Do students at various universities differ in how ...
- MARH - Do students at various universities differ in how sociable they are? ...
- statistics - Do students at various colleges differ in how sociable they are? ...

More Related Questions