COURSE:
MSCI 3700
Name:
EXAM 1
S.S.#:
INSTRUCTOR:
Dr. Spalding
SEMESTER:
FALL 97
Consider the following data for answering the next 6 questions.
-8,
1,
-5,
1,
7,
7,
-3
1.
Calculate the value of the Mean from the data.
a.
-5
b.
-8
c.
0
d.
10
e.
8
2.
What is the value of the Median?
3.
Select the number of modes
a.
No Mode
b.
Unimodal
c.
Bimodal
4.
What is the value of the Variance?

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5.
What is the value of the Standard deviation?
6.
What is the value of the Range?
a.
-18
b.
-15
c.
-10
d.
12
e.
15
7.
Suppose that 20% of all college students smoke cigarettes. A sample of 18 is selected
randomly.
What is the probability that between 1 and 4 ( inclusive ) students smoke?
8.
A student takes an exam containing 11 multiple choice questions. The probability of
choosing a correct answer by knowledgeable guessing is 0.4.
If the student makes knowledgeable guesses, what is the probability that he will get
exactly 6 questions right?

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