a)
b)
x1 = | 68 | x2 = | 74 |
p̂1=x1/n1 = | 0.4533 | p̂2=x2/n2 = | 0.4933 |
n1 = | 150 | n2 = | 150 |
estimated prop. diff =p̂1-p̂2 = | -0.0400 | ||
pooled prop p̂ =(x1+x2)/(n1+n2)= | 0.4733 | ||
std error Se=√(p̂1*(1-p̂1)*(1/n1+1/n2) = | 0.0577 | ||
test stat z=(p̂1-p̂2)/Se = | -0.69 |
rejection region : z>1.64
z< -1.64
c)
since test statistic is not in rejection region:
Independent random samples of n = 150 and n = 150 observations were randomly selected from...
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