Homework: Homework- Section 7.2 Save Score: 0 of 1 pt 4016(3complete) HW Score:
ID: 3321965 • Letter: H
Question
Homework: Homework- Section 7.2 Save Score: 0 of 1 pt 4016(3complete) HW Score: 15%, 0.9 of 6 pts 7.2.36-T Question Help Mieage ratings for cars and trucks generally come with a qualifier stating actual mileage wil depend on driving conditions and habits. A car manufacturer states that its new truck wil average 18 mles per gallon with combined town and country driving. Assume the mean stated by the manufacturer is the actual average, and the distrbution has a standard daviation of 38 mpg. Complete parts a and b below a. Given the above mean and standard deviation, what is the probability that 100 drivers will average more than 17 miles per galon? (Round to four decimal places as needed.)Explanation / Answer
= 18 = 3.8
n = 100
P(x' > 17)
= P(z > (17 - 18) / 3.8 * 100)
= P(z > -2.631)
= 0.9957.
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