Question

Suppose that it is reported in the news that 12% of the people living and working in Kokomo feel that their commute is too long. What is the travel time to work that separates the top 12% of people with the longest travel times and the lower 88%

Answer 1

Answer:

22.3 minutes

Step-by-step explanation:

The computation of the travel time is as follows:

Given that

$\mu$ = 17

And, the standard deviation is 4.5

P(X≤C) = 0.88

P( x - $\mu$) ÷ $\sigma$ ≤  (C - $\mu$)  ÷ $\sigma$  = 0.88

(C - $\mu$)  ÷ $\sigma$  = 1.175

c = $\mu$ +  1.175 × $\sigma$

= 17 + 1.175 × 4.5

= 22.3 minutes

Hence, the travel time is 22.3 minutes