Z scores - please help

[Missy50]

I am having a terrible grasping my homework assignment. Please help!
Based on the information given for the following studies, decide whether to reject the null hypothesis. Assume that all populations are normally distributed. 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.
c. Your conclusion.

Study___u___o____Sample score p Tails of Tests
A 5 1 7 0.05 1 (high predicted)
B 5 1 7 0.05 2
C 5 1 7 0.01 1 (high predicted)
D 5 1 7 0.01 2

 

[Deleted member 4993]

I am having a terrible grasping my homework assignment. Please help!
Based on the information given for the following studies, decide whether to reject the null hypothesis. Assume that all populations are normally distributed. 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.
c. Your conclusion.

Study___u___o____Sample score p Tails of Tests
A 5 1 7 0.05 1 (high predicted)
B 5 1 7 0.05 2
C 5 1 7 0.01 1 (high predicted)
D 5 1 7 0.01 2

What are your thoughts?

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[Missy50]

What are your thoughts?

Please share your work with us ...even if you know it is wrong

If you are stuck at the beginning tell us and we'll start with the definitions.

I took the mean (5) - 7 (sample) = -2

Then I took -2/1 (standard) = -2 but I'm not sure if these steps are even correct. Please advise