business Statistics (WDCP 356) Jfome Section T Chapter 3: Statistical Description of Data (100 Points) Due Date: Saturday (3/2/2013) • USE SPSS to solve the problem • Also submit SPSS output of the problem along with your answers (50 points) Problem: One of the major measures of the quality of service provided by any organisation is the speed withwhich it responds to customer complaints. A large family-held department store selling furniture andflooring including carpet had undergone a major expansion in the past several years. In particular theflooring department had expanded from 2 installation crews to an installation supervisor a measurer and 15 installation crews. A sample of 50 complaints concerning carpet installation was selected during a recent year. The data below represent the number of days between the receipt of a complaint and the resolution of the complaint: 54 27 74 110 94 4 29 13 4 26 5 152 27 110 31 165 26 13 52 20 35 2 11 29 26 32 25 10 30 23 137 123 19 61 5 29 1 5 22 33 31 81 126 35 12 28 14 27 36 68 a. Compute the mean median first quartile. and third quartile. (4 points) b. Compute the range interquartile range.) variance standard deviation and coefficient of. variation. . . ^”O r i-qxi- /(/ -73 _ ^ t/-«. (6 points) c. List the five-number summaries of the number of days between the receipt of a complaint and the resolution of the complaint. (5 points) d. Construct boxplot and describe the shape of the distribution of the data. (15 points) e. On the basis of the results of (a) through (d) if you had to tell the president of the company how long a customer should expect to wait to have a complaint resolved what would you say? Explain. (20 points) /?/
