Mathematics, 09.04.2020 21:11 arianawelsh123l
To estimate the fuel efficiency of a new compact automobile, an engineer performed n = 16 test runs and recorded the miles per gallon (mpg) for each run. The sample mean was 42.2 mpg with standard deviation 8.8.a) construct a 99% confidence interval for the true mean mileage for this automobile.
- Lower limit= ?
-upper limit= ?
(please round your answers to 1 decimal place)
b) the manufacturer of this automobile claims that it gets 50mpg. Based on the confidence interval, do you think this is a reasonable claim? why or why not?
Answers: 1
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To estimate the fuel efficiency of a new compact automobile, an engineer performed n = 16 test runs...
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