Question

2 An automobile manufacturer substitutes a different engine in cars that were known to have an average
miles-per-gallon rating of 61.5 on the highway. The manufacturer wants to test whether the new engine
changes the miles-per-gallon rating of the automobile model. A random sample of 200 trial runs gives mean
= 59.1 miles per gallon and SD = 9.6 miles per gallon. Using the 0.05 level of significance, is the average
miles-per-gallon rating on the highway for cars Using the new engine different from the rating for cars
using the old engine?​

Answer 1

Answer:

2 An automobile manufacturer substitutes a different engine in cars that were known to have an average

miles-per-gallon rating of 61.5 on the highway. The manufacturer wants to test whether the new engine

changes the miles-per-gallon rating of the automobile model. A random sample of 200 trial runs gives mean

= 59.1 miles per gallon and SD = 9.6 miles per gallon. Using the 0.05 level of significance, is the average

miles-per-gallon rating on the highway for cars Using the new engine different from the rating for cars

using the old engine?

Explanation:

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