1.The BSDA package in R contains a data set namedCat. The data set contains reading scores on the California achievement test for a group of 3rd graders. The format is a data frame/tibble with 17 observations on one variable namedscore. The sample mean ofscoreis _____, and the sample standard deviation ofscoreis _____?

2.The mean life of a pair of shoes is 35 months with a standard deviation of 10 months. If the life of the shoes is normally distributed, approximately how many pairs of shoes out of one million will need replacement before 36 months?

3.Given the following data, find the predicted value of y (y-hat) when x equals 16.

x = 10, 12, 14, 16, 18, 20, 22, 24, 26

y = 10, 11, 15, 15, 17, 20, 23, 25, 24