According to a recent survey, Americans were expected to spend an average of 985.50 hours watching television in 2019. Suppose that the standard deviation of the distribution of times that Americans...

Extracted text: According to a recent survey, Americans were expected to spend an average of 985.50 hours watching television in 2019. Suppose that the standard deviation of the distribution of times that Americans spent watching television in 2019 is 285.20 hours. Using Chebyshev's theorem, find the interval that will contain the television viewing times of at least 75% of all Americans. Enter the exact answers. From hours to hours.