Author Question: The time (in years) until the first critical-part failure for a certain car is exponentially ... (Read 58 times)

Brittanyd9008 · **on:** Jun 24, 2018

The time (in years) until the first critical-part failure for a certain car is exponentially distributed with a mean of 3.4 years. Find the probability that the time until the first critical-part failure is less than 1 year.

A) 0.254811 B) 0.745189 C) 0.966627 D) 0.033373

Question 2

Find a value of the standard normal random variable z, called z0 , such that P(-z0 z z0 ) = 0.98.

A) 2.33 B) .99 C) 1.645 D) 1.96