Question 1178602
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Hi
population:  p = .12 
sample:  n = 300   x̄ = 27/300 = .09
Ho:  p = .12
Ha:  p < .12
a=0.05, one-tailed: z(.95) = 1.645 critical value
{{{z =blue (x - mu)/sqrt(blue(p(1-p)/n)) =(-.03)/sqrt((.12)(.88)/300)}}}
 z = -1.6
|-1.6| < 1.645
Fail to Reject Ho, Insufficient evidence
Wish You the Best in your Studies.
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