Final answer:
Tests support Superior Motor Company's claim that the Astro sedan averages more than 42 miles per gallon on the highway; this is after rejecting the null hypothesis.
Step-by-step explanation:
In non-technical terms, after performing a hypothesis test, we have enough evidence to say that the claim made by Superior Motor Company about its new sedan, the Astro, averaging better than 42 miles per gallon on the highway is supported.
To put it simply, the tests we conducted suggest that the Astro does indeed get more than 42 miles to the gallon on the highway. This conclusion comes after rejecting the null hypothesis (the assumption that the Astro would not exceed 42 miles per gallon) because the test showed that the actual mileage is likely to be higher.