IS S
The store Better Buys knows that the cost to repair a
computer is normally distributed with a standard
deviation of $40 (4-40).
es
ng with
sions
A random sample of 10 computer repairs and found
the average of those 10 computer repairs was $154.
Construct a 95% confidence interval of the population
mean of a computer repair.
rning
$146.B0 SX S$161.70
$129 21 SA 5 $178 79
$146.16 4 $ $161 84
O$75 60 S# $ $232.40