You are asked:
a) the estimate
b) the standard error
c) the multiplier
A) The point estimate is given by:
p = sample size / population size
= 44/80
= 0.55
B) The standard error is given by:
SE = [tex] \sqrt{ \frac{p(1-p)}{n} } [/tex]
= [tex] \sqrt{ \frac{0.55(1-0.55)}{80} } [/tex]
= 0.0556
C) In order to find the multiplier (z-score), you first need to calculate the probability:
(1-0.80)/2 = 0.10
Now, look at a z-table to find z = 2.32
