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In a mechanical aptitude test, persons who are 18 years old should average 73.2, with=8.6 =8.6. If 45 randomly selected persons average 76.7, determine the

In a mechanical aptitude test, persons who are 18 years old should average 73.2, with=8.6

=8.6. If 45 randomly selected persons average 76.7, determine the P- valuein testing the null hypothesis=73.2

=73.2against alternative>73.2

>73.2for=0.01

=0.01(correct to 4 decimal places)

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