ANS:
a.
b.
b.
c.
Hours of
Relative
Percent
Cum.
Sick Leave
Taken
Freq.
Freq.
Freq.
Freq.
10 - 19
6
0.20
20
6
20 - 29
11
0.37
37
17
30 - 39
5
0.16
16
22
40 - 49
6
0.20
20
28
50 - 59
2
0.07
7
30
d.
22
PTS:
1
TOP:
Descriptive Statistics
20.The sales records of a real estate company for the month of May shows the following house prices (rounded to the nearest $1,000). Values are in thousands
of dollars.105554585753060757995a.Develop a frequency distribution and a percent frequency distribution for the house prices. (Use 5 classes and have your first class be 20 - 39.)b.Develop a cumulative frequency and a cumulative percent frequency distribution for the above data.c.What percentage of the houses sold at a price below $80,000?
ANS:
a.
a.
b.
b.
Cum.
Sales Price
Percent
Cum.
Percent
(In Thousands
of Dollars)
Freq.
Freq.
Freq.
Freq.
20 - 39
1
10
1
10
40 - 59
2
20
3
30
60 - 79
4
40
7
70
80 - 99
2
20
9
90
100 - 119
1
10
10
100
c.
70%
PTS:
1
TOP:
Descriptive Statistics
21.The test scores of 14 individuals on their first statistics examination are shown below.9587524377847875639281839188Construct a stem-and-leaf display for these data.
PTS:
1
TOP:
Descriptive Statistics
22.A survey of 400 college seniors resulted in the following crosstabulation regarding their undergraduate major and whether or not they plan to go to
graduate school.
Undergraduate Major
Graduate School
Business
Engineering
Others
Total
Yes
35
42
63
140
No
91
104
65
260
Total
126
146
128
400
a.Are a majority of the seniors in the survey planning to attend graduate school?b.Which discipline constitutes the majority of the individuals in the survey?c.Compute row percentages and comment on the relationship between the students' undergraduate major and their intention of attending graduate school.d.Compute the column percentages and comment on the relationship between the students' intention of going to graduate school and their undergraduate major.
ANS:
PTS:
1
TOP:
Descriptive Statistics
