Question

1. The Pratt Corporation manufactures computer terminals. The following data give the number of computer terminals produced at the company for a sample of 30 days. 24 32 27 23 33 33 29 23 28 25 21 26 31 22 27 33 27 28 29 23 31 35 34 22 26 28 23 31 27 35 Make a frequency table showing class boundaries, class midpoints, frequencies, relative frequencies, and cumulative frequencies. What is the modal class?

2. The following date give the weight (in pounds) lost by 16 new members of a health club at the end of their first two months of membership. 5 10 8 7 25 12 6 14 11 10 21 9 8 11 18 11 Find a. Mean b. Median c. Mode

3. The following data give the weekly dinner expenditures for a sample of five students. $62 96 45 55 72 a. Find the range b. Find the sample mean. c. Find the sample variance d. Find the sample standard deviation. e. Find the CV

4. The following data give the hours worked last week by 30 employees of a company. 42 45 40 38 35 47 40 27 39 43 40 53 23 51 42 48 40 36 51 40 48 34 21 40 31 34 16 39 41 36 Give the five-number summary including the low value, Q , Median, Q and high value. Find the interquartile range and check for outliers.

5. The following are the scores of 30 college students on a statistics test. 75 52 80 96 65 79 71 87 93 95 69 72 81 61 76 86 79 68 50 92 83 84 77 64 71 87 72 92 57 98 Make a stem-and-leaf display of the data.

Answer 1