Many computer sellers and most software vendors maintain helplines for customers. A random sample...

Many computer sellers and most software vendors maintain helplines for

customers. A random sample of the duration(in minutes) of technical support

calls to Hewlett-Packard was obtained, and the resulting stem-and-leaf plot is

given below.

0. 11223344555566678888999

1 . 0001222222335668999

2. 012334556678

3. 000123478

4 334468

5 125

6 15 Stem=tens

7 7 Leaf=ones

a. Describe the shape of this distribution of the duration of technical support

calls.

b. Use the plot to construct a frequency distribution using the class intervals

0-5, 5-10, 10-15, etc.

c. What proportion of support calls last less than 15 minutes?

d. If a call lasts at least 25 minutes, a supervisor monitors the conversation.

What proportion of calls were monitored?

Solved
STATISTICS 1 Answer Sahil Pratap Singh