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The average age of a commercial jet in the United States is 16.5 years an executive...

The average age of a commercial jet in the United States is 16.5 years an executive at an airline company thinks the average age of her plane is less than this she randomly selected 36 company planes and finds the sample average age is 15.2 years the population is 2.7 years a=0.05 ....what is the alternative hypothesis
What is the test statistics
What is the p-value
What is the conclusion
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