Will is throwing a ball across a 42 yard field. He threw it 3/7 of the way across the field. How far did Will throw the ball?
2 answers:
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Given :
p = 0.68
margin of error, E = 0.1
99% confident interval
alpha, α = 1 - 0.99
= 0.01
∴ (z-critical value)
Sample size =
= 144.37
= 145 (rounded off)
Therefore, there are 145 businesses does she need to sample to meet this criteria.