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to see if adolescents spend more or less than the national average by 25 per trip to the local mall, a manager surveyed 33 youngsters
to see if adolescents spend more or less than the national average by 25 per trip to the local mall, a manager surveyed 33 youngsters and found the average amount spent per vist was 22.50. the standard deviation of the sample was 3.70 at =0.02, can it be concluded that the average amount spent at the local mall is equal to the national average
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