SOLUTION:
Doctors believe that 70% of a certain type of operation are successful nationally. In a particular hospital, 50 of these operations were observed and 31 of them were successful.
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Doctors believe that 70% of a certain type of operation are successful nationally. In a particular hospital, 50 of these operations were observed and 31 of them were successful.
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Question 1178195:
Doctors believe that 70% of a certain type of operation are successful nationally. In a particular hospital, 50 of these operations were observed and 31 of them were successful. At a=0.05 is this hospital’s success rate different from the national average?
a.Yes because the z score of - 1.234 is inside the rejection region
b.No because the z score of - 1.234 is outside the rejection region
c.No because the z score of - 1.165 is outside the rejection region
d.Yes because the z score of - 1.165 is inside the rejection region
Hi
Ho: p = .7
Ha: p < .7
sample: n = 50 mean = 31/50 = .62
σ = 0.05, 0r .95 (z = 1.96) = -1.234
|-1.234| < 1.96
Is this hospital’s success rate different from the national average?
(Reject Ho?)
b. No because the z score of - 1.234 is outside the rejection region
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