8) A car manufacturer claims that a new model of their cars gets an average of 30 miles per gallon (mpg) on the highway. A random sample of 12 of these cars is tested, and they yield an average of 28 mpg with a sample standard deviation of 2 mpg. Is there enough evidence to challenge the manufacturer's claim at a significance level of 0.01?
8) A car manufacturer claims that a new model of their cars gets an average of 30 miles per gallon (mpg) on the highway. A random sample of 12 of these cars is tested, and they yield an average of 28 mpg with a sample standard deviation of 2 mpg. Is there enough evidence to challenge the manufacturer's claim at a significance level of 0.01?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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Can someone please help? Thank you.
![8) A car manufacturer claims that a new model of their cars gets an average of 30 miles per gallon (mpg) on the
highway. A random sample of 12 of these cars is tested, and they yield an average of 28 mpg with a sample
standard deviation of 2 mpg. Is there enough evidence to challenge the manufacturer's claim at a significance
level of 0.01?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd86db678-bc86-44fd-bd72-7c276c312ad6%2Fc801a386-5f12-4525-aa12-e448f63dbc09%2F6xu0ur_processed.jpeg&w=3840&q=75)
Transcribed Image Text:8) A car manufacturer claims that a new model of their cars gets an average of 30 miles per gallon (mpg) on the
highway. A random sample of 12 of these cars is tested, and they yield an average of 28 mpg with a sample
standard deviation of 2 mpg. Is there enough evidence to challenge the manufacturer's claim at a significance
level of 0.01?
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