OM – 210, Summer A2010, (PROF.
Sid Das)
HOMEWORK  1 (45 points)
Please answer on a SCANTRON sheet.
WRITE YOUR NAME AND CLASS TIME ON THE TOP OF YOUR SCANTRON
SHEET.
HOMEWORK DUE DATE is May 27, 2010
Problem A
The table below shows a frequency distribution:
NUMBER OF HOURS
FREQUENCY
1  10
40
11  20
40
21  30
70
31  40
50
BASED ON THIS TABLE  ANSWER QUESTIONS 1
THROUGH
4
BELOW.
1.
The class width for this distribution is:
a.
9
b.
30
c.
11
d. 10
2.
The number of students working 30 hours or less is:
a.
150
b.
80
c.
70
d. 110
3.
The Cumulative Relative Frequency of students working 30 hours or less is:
a.
0.2
b.
0.75
c.
0.40
d. 1.0
4.
The Relative Frequency for the class 11  20 is:
a.
80
b.
0.20
c.
0.45
d. 0.65
e. 40
Problem B
The sample data below has been collected for a research experiment.
7,
6,
5,
8,
12,
5,
4,
5,
6,
12
BASED ON THIS DATA  ANSWER QUESTIONS 5 THROUGH
9
BELOW.
5.
The Median is:
a.
5
b.
6
c.
7
d. 8
6.
The Mode is:
a.
5
b.
6
c.
7
d. 8
7.
The Mean is
a.
5
b.
6
c.
7
d. 8
1
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The Third Quartile
is:
a.
5
b.
6
c.
7
d. 8
9.
The Range is:
a. 8
b. 2
c.
10
d.12
Problem C:
A bellshaped distribution has a mean of 15 and a standard deviation of 3.1.
BASED ON THIS DATA  ANSWER QUESTIONS 10 and 11
BELOW.
10.
What percentage of data values fall between 11.9 and 18.1?
a.
95%
b.
68%
c.
75%
d. Almost 100%
11.
Between what two data numbers will 95% of the data lie?
a.
11.9 and 18.1
b.
5.7 and 24.3
c.
14.05 and 15.95
d. 8.8 and 21.2
12. The mean daily sales for a company last year was $52.37 million with a standard deviation
of $2 million. What percentage of sales were between $49.37 to $55.37 million.
a.
At least
55.55%
b.
At least
44.44%
c.
At least 75%
d. At least 90%
Problem D:
The table below shows the probability distribution for the daily demand of microcomputers at a
local store.
DEMAND
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 Summer '08
 SINGER
 Normal Distribution, Standard Deviation, Variance, Insurance Claims

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