Question 1194200
Ho:  p is 0.37
Ha: the proportion not meeting the standard is unchanged or p NE 0.37
alpha=0.01 p{reject Ho|Ho true}
test is a 1 sample p
critical value is |z|>2.576
z=(phat-0.37)/sqrt(0.37*0.63/100)
=-0.09/0.0482=-1.86
fail to reject Ho with insufficient evidence to say that there was a change
99% half-interval is 2.576*SE, which Is sqrt(0.28*0.72/100)=0.0449
half-interval is 0.1157
(0.16, 0.40) Because 0.37 is in the interval of uncertainty there is insufficient evidence to say that there has been a significant change at the 99% level.