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1
COURSE:
MSCI 3700
Name:
EXAM
1
Version B
INSTRUCTOR: Chong
Student SS#
SEMESTER:
Summer II 2000
Student Signature
Instructions:
n
Please put your name, section number, and student number on both
this
exam cover sheet and
your scantron.
P
You have 1hour and 40 minutes to complete this exam.
P
The exam is open book (tables in Appendix), open notes, and open mind.
Please show all your work on the exam and mark all answers on the
scantron.
P
No cheating.
P
Good luck!
1
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View Full Document 11. Which of the following can be classified as qualitative data?
A. interval
B. nominal
C. ordinal
2. What level of measurement is “kind of gasoline purchases” such as regunleaded vs super
unleaded vs diesel?
A. Ratio
B. Ordinal
C. Interval
D. Nominal*
E. continuous
Use the following sample values to answer the next four questions
25, 24, 28, 15, 14, 29, 36, 14, 18
3. What is the sample standard deviation?
A.
16.5
B.
594.84
C.
9.375
D.
8.61
E.
22.87*
4. What is the sample mean?
A.
24.0
B.
22
C.
9.89*
D.
561.14
E.
8.95
5. What is the mode?
A.
18
B.
28
C.
36
D.
14*
E.
25
2
6. What is the sample variance?
A.
9.25
B.
8.61
C.
16
D.
14
E.
522.86*
7.
The 1
st
quartile is?
A.
28
B.
25
C.
15
D.
24
E.
14*
Use the following table for the next 3 questions.
It shows the frequency distribution of over 1400 steaks ordered over the past 40 days at a local
restaurant.
For example,
on one day 87 steaks were ordered; on another day 93 steaks were
ordered; and on a third day 90 steaks were ordered; yielding a frequency of 3 for the fifth class
interval.
On the other 29 days less than 80 steaks were ordered for each day.
Number of Steaks
Number of Days that
many ordered
Relative Frequencies
Cumulative Relative
Frequencies
0 to 19
7
0.175
0.175
20 to 39
**
****
****
40 to 59
5
0.125
0.525
60 to 79
8
****
0.725
80 to 99
**
0.275
****
Totals
40
****
****
8. What is the relative frequency for the class interval “20 to 39"?
A.
0.175
B.
0.125
C.
0.225*
D.
0.200
E.
0.275
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A.
45.16
B.
53.00*
C.
1400
D.
40
E.
59.51
10. Use the table below to determine the price index for a gallon of regular gasoline for
2000
using
1990
as the base year.
Year
1980
1985
1990
1995
2000
Price of a
Pack
$0.63
$0.58
$1.13
$1.35
$1.75
Price Index is:
A.
64.57
B.
144.86
C.
277.77
D.
154.87*
E.
596.15
Use the attached time series decomposition spreadsheet (see pages 1115) to answer
questions #11 through #15.
The data shows the number of babies born at a local hospital for each month, 1995 thru
1998.
11. What is the centered moving average for the December 1995?
A.
56.292
B.
675.000
C.
59.667
D.
56.542*
E.
0.796
12. What is the Moving Total between 14
th
and 15
st
months (Feb ‘96 and Mar ‘96)?
A.
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This note was uploaded on 03/09/2011 for the course DSCI 2710 taught by Professor Hossain during the Spring '08 term at North Texas.
 Spring '08
 Hossain

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