1.) Scores turned in by an amateur golfer at a golf course during 2017 and 2018 are as follows.

2017 Season	73	77	78	76	74	72	74	76
2018 Season	70	69	74	76	84	79	70	78

(a)Use the mean and standard deviation to evaluate the golfer's performance over the two-year period. Compute the mean and standard deviation for the 2017 season. (Round the standard deviation to two decimal places.)mean sample standard deviation computed the mean and standard deviation for the 2018 season. (Round the standard deviation to two decimal places.)mean sample standard deviation

(b)What is the primary difference in performance between 2017 and 2018? The mean score in 2018 is ---Select--- greater than lower than the same as the mean score in 2017. The standard deviation for the scores in 2018 is ---Select--- greater than lower than the same as the standard deviation for scores in 2017. What improvement, if any, can be seen in the 2018 scores? In 2018, ---Select--- one two three four of the eight scores were better than any score reported for 2017.

2.) U.S. companies lose $63.2 billion per year from workers with insomnia. Workers lose an average of 7.8 days of productivity per year due to lack of sleep. The following data show the number of hours of sleep attained during a recent night for a sample of 20 workers.

7	6	13	6	7	10	12	6	12	6
10	8	11	7	12	9	11	7	13	9

(a)What is the mean number of hours of sleep for this sample? h

(b)What is the variance? Standard deviation (in h)? (Round your answers to two decimal places.)

variance

standard deviation h