(a) The population parameter is students who ran the mile in less than 10 minutes.
(b) The hypothesis being tested is:
H0: p = 0.70
Ha: p < 0.70
(c) The significance level is 0.05.
(d) In order to conduct a one-sample proportion z-test, the following conditions should be met:
n⋅p = 756*0.70 ≥10
n⋅(1−p) = 756*(1 - 0.70) ≥10
All the conditions are met.
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