Question 1044443
Ho:P=0.000340
Ha:P NE to 0.000340
alpha=0.005
test statistic is one-sample proportion (phat-p)/{sqrt(p*(1-p))/n}
z=(phat-0.000340)/sqrt{(0.000340)(0.99966)/420009}; phat is 157/420,009=0.00037
SE=sqrt {(0.0003399)/420009}=0.00002845
Critical value is  z>|2.576|
Calculation is z= -(0.00003)/SE=-1.05
p-value is 0.23
Fail to reject Ho