Posted by **Sandra** on Monday, December 21, 2009 at 10:21pm.

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

students were randomly selected from each of three colleges in a particular region

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

day with other students. The results for College X was a mean of 5 hours and

an estimated population variance of 2 hours; for College Y, M = 4, S2 = 1.5;

and for College Z, M = 6, S2 = 2.5. 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 (a) and (b) to someone who has never

had a course in statistics

- college (statistics) - help requested -
**drwls**, Tuesday, December 22, 2009 at 3:30am
Statistics help needed.

"college" is not a subject

- Statistics -
**PsyDAG**, Tuesday, December 22, 2009 at 10:01am
Ho: μX = μY = μZ

Ho: μX ≠ μY ≠ μZ

Use three two-tailed tests (XY, XZ and YZ) for difference between means or an ANOVA. (Remember with the three tests, the probability of getting any *one* of them significant is now .15 [.05 + .05 + .05].)

Your explanation will probably deal with probability and chance expectations.

For you to explain it to someone without a statistics background will mean that you really understand what is happening. In my teaching, I found that, to teach a concept, I really had to understand it myself. Now you need to understand the concepts yourself. It takes a good amount of effort. Are you willing to expend the effort?

I hope this helps.

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