4) THE MEAN PRICE OF NEW TRUCKS AT A TRUCK
DEALERSHIP IS NORMALLY DISTRIBUTED WITH A
MEAN M= $138,500 AND ST. DEV = $8,300
IF A NEW TRUCK IS RANDOMLY SELECTED FIND
THE PROBABILITY THAT IT WILL COST
A) MORE THAN $145,000
B) NO MORE THAN $130,000
IF A SAMPLE OF 9 TRUCK IS TAKEN, FIND THE
PROBABILITY THAT THE MEAN WILL
COST LESS
TARD
$140,000