Solution :
Given that,
n = 80
x = 7
Point estimate = sample proportion = = x / n = 7 / 80 = 0.0875
1 - = 1 - 0.0875 = 0.9125
At 99% confidence level
= 1 - 99%
=1 - 0.99 =0.01
/2
= 0.005
Z/2
= Z0.005 = 2.576
Margin of error = E = Z / 2 * (( * (1 - )) / n)
E = 2.576 (((0.0875 * 0.9125) / 80)
E = 0.0813
In a study of perception, 80 men are tested and 7 are found to have red/green...
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