1a. The probability is 0.314 that the gestation period of a woman will exceed 9 months. In six human births, what is the probability that the number in which the gestation period exceeds 9 months is between three and five, inclusive?

1b. A variable is normally distributed with mean 68 and standard deviation 10. Find the percentage of value of the variable that are at least 75.

1c. The A. C. Nielsen Company re-ported in the Nielsen Report on Television that the mean weekly television viewing time for children aged 2-6 years is 24.85 hours. Assume that the weekly television viewing times of such children are normally distributed with a standard deviation of 6.23 hours and apply the empirical rule to fill in the blanks. a. Approximately 95% of all such children watch between and hours of TV per week.