SOLUTION: Is this a t-test or z-test? Why? A healthcare professional wants to determine whether individuals with hypertension who take atenolol have significantly lower blood pressure than

Question 1001874: Is this a t-test or z-test? Why?
A healthcare professional wants to determine whether individuals with hypertension who take atenolol have significantly lower blood pressure than individuals with hypertension who do not take atenolol. For individuals who have not been prescribed atenolol, the population systolic blood pressure is 165. The 30 individuals who take atenolol have an average systolic blood pressure of 147, with a sample standard deviation of 6.
I think it is a t-test because we have a sample standard deviation given.
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

Yes, but you have a sample size of 30, so most texts will tell you that is close enough to normal to use normal.

John

My calculator said it, I believe it, that settles it

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