Mathematics, 20.03.2020 12:59 miyah1199
In a sample of 100 U. S. adults aged 18–24 who celebrate Halloween, the mean amount spent on a costume was $37.51 with a standard deviation of $16.44. A retail specialist claims that the mean amount spent on Halloween costumes for all U. S. adults aged 18–24 is between $35.07 and $39.95. With what level of confidence can this claim be made? Answer is 85.9%
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In a sample of 100 U. S. adults aged 18–24 who celebrate Halloween, the mean amount spent on a costu...
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