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:

(a) Between $20.50 and $24.00 per hour (Round your answer to 4 decimal places.)

Probability

(b) More than $24.00 per hour (Round your answer to 4 decimal places.)

Probability

(c)
Less than $19.00 per hour (Round intermediate calculations to 2 decimal place. Round final answer to 4 decimal place)

Probability

a) 0.3413

b) 0.1587

c) 0.3341

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 20.50 dollars

Standard Deviation, σ = 3.50 dollars

We are given that the distribution of hourly wages is a bell shaped distribution that is a normal distribution.

Formula:

a) P(Between $20.50 and $24.00 per hour

b) P(More than $24.00 per hour)

P(x > 24)

Calculation the value from standard normal z table, we have,  

c) P(Less than $19.00 per hour)

P(x < 19)

Calculation the value from standard normal z table, we have,  

step-by-step explanation:

descending order means to order the polynomials from the term with the largest exponent to the term with the smallest exponent.  

therefore, the correct answer is d.  

the answer is mp

step-by-step explanation: