NRF/Big research provided results of a consumer holiday spending survey (USA Today, December 20, 2005). The following data provide the dollar amount of holiday spending for a sample of 25 consumers.
|
1200
|
850
|
740
|
590
|
340
|
|
450
|
890
|
260
|
610
|
350
|
|
1780
|
180
|
850
|
2050
|
770
|
|
800
|
1090
|
510
|
520
|
220
|
|
1450
|
280
|
1120
|
200
|
350
|
a. What is the lowest holiday spending? Highest?
b. Use a class width of $250 to prepare a frequency distribution and a percent frequency
c. Prepare a histogram and comment on the shape of the distribution
d. What observation can you make about holiday spending?
The Nielsen Home Technology Report provided information about home technology and it usage. The following data are the hours of personal computer usage during one week for a sample of 50 persons.
|
4.1
|
1.5
|
10.4
|
5.9
|
3.4
|
5.7
|
1.6
|
6.1
|
3.0
|
3.7
|
|
3.1
|
4.8
|
2.0
|
14.8
|
5.4
|
4.2
|
3.9
|
4.1
|
11.1
|
3.5
|
|
4.1
|
4.1
|
8.8
|
5.6
|
4.3
|
3.3
|
7.1
|
10.3
|
6.2
|
7.6
|
|
10.8
|
2.8
|
9.5
|
12.9
|
12.1
|
0.7
|
4.0
|
9.2
|
4.4
|
5.7
|
|
7.2
|
6.1
|
5.7
|
5.9
|
4.7
|
3.9
|
3.7
|
3.1
|
6.1
|
3.1
|
Summarize the data by constructing the following:
a. A frequency distribution (use a class width of 3 hours)
b. A relative frequency distribution
c. A histogram
d. An Ogive
e. Comment on what the data indicate about personal computer usage at home