Question

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求救 統計#9 （可支薪）

9.A society PAWT is primarily concerned with the amount of TV viewed by todays youth. It asked
300 parents of elementary school aged children to estimate the number of hours their child
spent watching television in any given week. The mean and the standard deviation for their
responses were 17 and 3, respectively. PAWT then constructed a stem-and-leaf display for the
data, which showed that the distribution of the number of hours was a symmetric,
mound-shaped distribution. Identify the interval where you believe appropriately 95% of the
television viewing fell in the distribution.