Answers
Cas_emits modethan-86 Given D- 25 Plz) 86-82- 5/25 86 6Jn (3(2)d 3 2)d-1 4-Uggyg683 O-0oOD- hougIN P4s Bu'sn - Ptable P(x }8G) = 0-00DD MOG lere Thus The pub.that th avesag_Nox of these ees 25 Cass sabove 86 tuaffar
In 2017, the entire fleet of light‑duty vehicles sold in the United States by each manufacturer must emit an average of no more than 86 milligrams per mile (mg/mi) of nitrogen oxides (NOX) and nonmethane organic gas (NMOG) over the useful life ( 150,000 miles of driving) of the vehicle. NOX + NMOG emissions over the useful life for one car model vary Normally with mean 82 mg/mi and standard deviation 5 mg/mi. (
a) What is the probability that a single car of this model emits more than 86 mg/mi of NOX + NMOG? (Enter your answer rounded to four decimal places.) probability:
(b) A company has 25 cars of this model in its fleet. What is the probability that the average NOX + NMOG level ?¯ of these cars is above 86 mg/mi? (Enter your answer rounded to four decimal places.)
Cas_emits modethan-86 Given D- 25 Plz) 86-82- 5/25 86 6Jn (3(2)d 3 2)d-1 4-Uggyg683 O-0oOD- hougIN P4s Bu'sn - Ptable P(x }8G) = 0-00DD MOG lere Thus The pub.that th avesag_Nox of these ees 25 Cass sabove 86 tuaffar