Question

A recent study of the hourly wages of maintenance crew members for major airlines showed that the mean hourly salary was $20.50, with a standard deviation of $3.50. Assume the distribution of hourly wages follows the normal probability distribution. We select a crew member at random. What is the probability the crew member earns: Between $20.50 and $24.00 per hour

Answer 1

P(20.5<X<24) = P(0<Z<1)

where, Z = ( X-mu)/sigma

So,

P(0<Z<1) = 0.841 - 0.5 = 0.341

Step-by-step explanation: