Question

By the survey conducted by YRBSS the average number of days that students lift the weights in a week is 3 days. In a sample of 100 students from the YRBSS survey of 2013, the average number of days per week that students lifted weights was 2.78 days with a standard deviation of 1.56 days. Assume that the number of days follows normal distribution, test whether there is a difference in the average number of days of overall survey of YRBSS survey and 2013 YRBSS survey?

Answer 1

Answer:

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