Homework
Problem 2-7
a. Explain the overall customer satisfaction with the Delta flight by using the percent
frequency distribution and bar chart.
The percent and relative percent frequency distribution is:
Rating
Cumulative
Frequency
Valid
Percent
Valid Percent
Percent
Very Good
23
46.0
46.0
100.0
Excellent
20
40.0
40.0
40.0
Good
4
8.0
8.0
50.0
Poor
2
4.0
4.0
54.0
Fair
1
2.0
2.0
42.0
Total
50
100.0
100.0
The reviews of overall customer indicate the data of Delta flight does not need any significant
changes for the improvement of the satisfaction rating. Because proportion of very good and
excellent percentage is 86% and 96% tends to good or better.
b. Would this be helpful information to a manager looking for ways to improve the overall
customer satisfaction on Delta flights? Explain.
Based on the result of customer satisfaction survey we think that this information would not be
helpful information to manager looking for ways to improve the overall customer satisfaction on
Delta flights. Because 96% people inside of the data sample showed a satisfied result in exercise
(a). If survey’s result was bad we would think about improvements in the company.
Problem 2- 20
a. What is the least amount of time spent per week on meetings? The Highest?
Statistics
Time per Week on Meetings
N
Valid
25
Missing 0
Minimum
12.0
Maximum
23.0
b. Use a class width of two hours to prepare a frequency distribution and a percent
frequency distribution for the data.
Time per Week on Meetings
Cumulative
Frequency
Valid
Percent
Valid Percent
Percent
12.0
1
4.0
4.0
4.0
13.0
1
4.0
4.0
8.0
14.0
1
4.0
4.0
12.0
15.0
5
20.0
20.0
32.0
16.0
1
4.0
4.0
36.0
18.0
3
12.0
12.0
48.0
19.0
3
12.0
12.0
60.0
20.0
2
8.0
8.0
68.0
21.0
3
12.0
12.0
80.0
22.0
1
4.0
4.0
84.0
23.0
4
16.0
16.0
100.0
Total
25
100.0
100.0
c. Prepare a histogram and comment on the shape of the distribution.
Problem 2-34