The number of successes and the sample size for a simple random sample from a population are given below.
x=7,
n=28,
H0:p=0.4,
Ha:p<0.4,
α=0.10
a. Determine the sample proportion.
b. Decide whether using the one-proportion z-test is appropriate.
c. If appropriate, use the one-proportion z-test to perform the specified hypothesis test.
