a captain claims that at least 85% of the residents in his barangay have household pets. to test this claim a researcher randomly selected a sample of 550 residents and find that 495 of them do have household pets. at 0.05 level of significance.
formula that i used: z=p-P(population proportion/square root of p(p-1)/n
I DON'T KNOW WHAT TO DO.. please help. and is this one tailed test??
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