Question

The life of a certain brand of battery is normally distributed, with mean 128 hours and standard deviation 16 hours. What is the probability that a battery you buy lasts at most 100 hours? Standardize the variable.

Answer 1

1-P(z<1.75) D in EDG

Explanation:

For the second part !!

Answer 2

x = 100 is equivalent to z = -1.75

Explanation: