Question: A problem with a telephone line that prevents a customer form receiving or making calls is disconcerting to both the customer and the telephone company. The data at the top of page 198 (inserted below), represent two samples of 20 problems reported to two different offices of a telephone company. The time to clear these problems from the customers’ lines is recorded in minutes. PHONE

Central Office I Time to Clear Problems (minutes)

1.48 1.75 0.78 2.85 0.52 1.60 4.15 3.97 1.48 3.10

1.02 0.53 0.93 1.60 0.80 1.05 6.32 3.93 5.45 0.97

Central Office II time to Clear Problems (minutes)

7.55 3.75 0.10 1.10 0.60 0.52 3.30 2.10 0.58 4.02

3.75 0.65 1.92 0.60 1.53 4.23 0.08 1.48 1.65 0.72

For each of the two central office locations, decide whether the data appear to be approximately normally distributed by:

1. evaluating the actual versus theoretical properties.
2. constructing a normal probability plot.

Price: $2.99

Solution: The downloadable solution consists of 6 pages
Deliverable: Word Document