66% of men consider themselves professional baseball fans. you randomly select 10 men and ask each if he considers himself a pr
ofessional baseball fan. find the probability that the number who consider themselves baseball fans is (a) exactly five, (b) at least six, and (c) less than four.
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Answer: 18
Step-by-step explanation:
The formula to find the minimum sample size is given by :_
, where = population standard deviation.
z*= critical z-value.
E= Margin of error.
Given :
E= ± 8
We know that critical value corresponding to 99% confidence level = z*=2.576 [Using z-table]
Then, the required sample size would be :
[Round to next integer.]
Hence, the required minimum sample size = 18