Posted by **Kathy** on Monday, July 23, 2012 at 7:08pm.

Based on the information given for each of the following studies, decide whether to reject the null hypothesis. For each, give (a) the Z-score cutoff (or cutoffs) on the comparison distribution at which the null hypothesis should be rejected, (b) the Z score on the comparison distribution for the sample score, and (c) your conclusion. Assume that all populations are normally distributed.

Population

Study μ σ Sample Score p Tails of Test

A 5 1 7 .05 1 (high predicted)

B 5 1 7 .05 2

C 5 1 7 .01 1 (high predicted)

D 5 1 7 .01 2

I would prefer not the answer given but please show me how to do it. I just do not understand.

- Math -
**PsyDAG**, Tuesday, July 24, 2012 at 10:55am
What level of significance are you using? P ≤ .05? P ≤ .01?

Z = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores. For a one-tailed test, find Z with .05, but with a two-tailed test, look for Z with .025. If using P ≤ .01, use similar process.

- Math -
**Kathy**, Saturday, July 28, 2012 at 12:57am
i have the answers, but does not have the answers for the set of problems I was working on. That was one of my questions I was not completly sure of. I copied the problem word for word from the text. I did as much calculations as I knew how...it was then trying to figure out how to get the probability i think. This chapter threw me for a loop.

## Answer this Question

## Related Questions

- psychology statistics - 15. Based on the information given for each of the ...
- statistics psy/315 - Based on the information given for each of the following ...
- PSY315 - Based on the information given for each of the following studies, ...
- Statistics - What does it mean when a researcher chooses the cutoff in a ...
- Statistical reasoning in Psychology - 4. Suppose that previous studies have ...
- statistics - Use the given information to find the P-value. Also, use a 0.05 ...
- stats - For each of the following situations, determine: a) the null and ...
- Statistics - Please Help I'm desperate! Complete the hypothesis test with ...
- Statistics - PLEASE CHECK AND SEE IF I HAVE THESE ANSWERS CORRECT. T F 1. ...
- Stat - PLEASE CHECK AND SEE IF I HAVE THESE ANSWERS CORRECT. T F 1. Hypothesis ...

More Related Questions