8
8
6
11
11
9
8
5
11
4
8
5
14
7
12
8
6
11
9
7
9
15
8
8
12
5
9
8
5
9
10
11
3
9
8
6
128
56
54
91
190
23
160
298
445
50
578
494
37
677
18
74
70
868
108
71
466
23
84
38
26
814
17

Describing Data Graphic: Frequency Distributions and Graphic Presentation
47
50 60 70
80 90 100
25
20
15
10
5
0
Score
Frequency
3
14
21
12
6
34.
The
Journal of Finance
made its content available on the Internet starting in July of 2005.
The table below shows the number of times a monthly version was downloaded and the
number of articles that were viewed during each month. Suppose you wish to make a
frequency distribution of the number of downloads.
312
2,753
2,595
6,057
7,624
6,624
6,362
6,575
7,760
7,085
7,272
5,967
5,256
6,160
6,238
6,709
7,193
5,631
6,490
6,682
7,829
7,091
6,871
6,230
7,253
5,507
5,676
6,974
6,915
4,999
5,689
6,143
7,086
a.
How many classes would you propose?
b.
What class interval would you suggest?
c.
What quantity would you use for the lower limit of the initial class?
d.
Using your responses to parts (a), (b), and (c), create a frequency distribution.
e.
Identify the appearance of the frequency distribution.
35.
The following histogram shows the scores on the first exam for a statistics class.
a.
How many students took the exam?
b.
What is the class interval?
c.
What is the class midpoint for the first class?
d.
How many students earned a score of less than 70?
36.
The following chart summarizes the selling price of homes sold last month in the
Sarasota, Florida, area.
a.
What is the chart called?
b.
How many homes were sold during the last month?
c.
What is the class interval?
d.
About 75 percent of the houses sold for less than what amount?
e.
One hundred seventy-five of the homes sold for less than what amount?
37.
A chain of sport shops catering to beginning skiers, headquartered in Aspen, Colorado,
plans to conduct a study of how much a beginning skier spends on his or her initial
purchase of equipment and supplies. Based on these figures, it wants to explore the
possibility of offering combinations, such as a pair of boots and a pair of skis, to induce
customers to buy more. A sample of cash register receipts revealed these initial purchases:
100
75
50
25
250
200
150
100
50
0
50
100
150
Selling Price ($000)
200
250
300
350
Frequency
Percent

48
Chapter 2
a.
Arrive at a suggested class interval. Use six classes, and let the lower limit of the first
class be $70.
b.
What would be a better class interval?
c.
Organize the data into a frequency distribution using a lower limit of $80.
d.
Interpret your findings.
38.
Following is the number of shareholders for a selected group of large companies (in
thousands):
$140
$ 82
$265
$168
$ 90
$114
$172
$230
$142
86
125
235
212
171
149
156
162
118
139
149
132
105
162
126
216
195
127
161
135
172
220
229
129
87
128
126
175
127
149
126
121
118
172
126
Number of
Number of
Shareholders
Shareholders
Company
(thousands)
Company
(thousands)
Southwest Airlines
144
Standard Oil (Indiana)
173
General Public Utilities
177
Home Depot
195
Occidental Petroleum
266
Detroit Edison
220
Middle South Utilities
133
Eastman Kodak
251
DaimlerChrysler
209
Dow Chemical
137
Standard Oil of California
264
Pennsylvania Power
150
Bethlehem Steel
160
American Electric Power
262
Long Island Lighting
143
Ohio Edison
158
RCA
246
Transamerica Corporation
162
Greyhound Corporation
151
Columbia Gas System
165
Pacific Gas & Electric
239
International Telephone &
Niagara Mohawk Power
204
Telegraph
223
E. I. du Pont de Nemours

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