Question

A car is designed to last an average of 12 years with a standard deviation of 0.8 years. What is the probability that a car will last less than 10 years?

Answer 1

is it 130?

Answer 2

basically u just want to know how many standard deviations away are you from your mean, to get to 10

Answer 3

and then u can look up a table and answer

Answer 4

6.21%?

Answer 5

Hold on, I am calculating it

Answer 6

ok, or is it a lot less?

Answer 7

?

Answer 8

12-10 = 2
2 years = 2.25 std below the mean.
So, check your Z table for P(Z<-2.25)