Answer:
C) 94
Step-by-step explanation:
Margin of error = critical value Γ standard error
ME = CV Γ SE
Assuming n > 30, we can approximate CV with a normal distribution. Β At P = 95%, CV = 1.96.
SE = Ο / βn
SE = 593 / βn
Therefore:
120 = 1.96 Γ 593 / βn
n = 94
