Hypothesis testing The “Mars” division of a big auotmobile manufacturer specializes in manufacturing

Hypothesis testing

The “Mars” division of a big auotmobile
manufacturer specializes in manufacturing scooters for export The company
claims that these scooters average at least 55 miles per gallon in city
driving An independant consumer avocate road tested a sample of 25 scooters
The sample showed an average of 60 miles per gallon, with a standard deviation
of 10 miles per gallon At 010 level of significance, can the company’s claim
be rejected?

 
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