Determine the standardized test Zo, to test the claim about the population proportion p not equal...

Determine the standardized test Zo, to test the claim about the population proportion p not equal to o.325 given n = 42 and phat=.247. Use significance sign = 0.05

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Expert Solution

null Hypothesis: Ho: p		=	0.325
alternate Hypothesis: Ha: p		≠	0.325

for 0.05 level with two tailed test , critical z=			1.9600
Decision rule : reject Ho if absolute value of test statistic \|z\|>1.96

sample size n =		42
std error se =√(p*(1-p)/n) =		0.0723
sample proportion p̂ = x/n=		0.2470

test stat z0 =(p̂-p)/√(p(1-p)/n)=		-1.08

since test statistic does not falls in rejection region we fail to reject null hypothesis

orchestra answered 2 years ago

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