Question 875030
mean life of 700 hours and a standard deviation of 122 hours
Trial 147
P(x > 676) z = -24/(122/sqrt(147)) -24/10.0624 = -2.3851
P(z > -2.3851) = .9915  0r 99.15%
What is the probability that you will <u>not</u> buy again from this manufacturer .0085 or .85%