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Exam (elaborations) MIDTERM EXAM MATH302 (MATH302)
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Exam (elaborations) MIDTERM EXAM MATH302 (MATH302)
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Part 1 of 9 - 1.0/ 1.0 Points1.0/ 1.0 Points
Question 1 of 25
Which measure of central location is meaningful when the data are categorical?
A.The mode
B.The median
C.The mean
D.The range
Answer Key: A
Part 2 of 9 - 2.0/ 2.0 Points
1.0/ 1.0 Points
Question 2 of 25
What type of probability uses sample spaces to determine the numerical probability that an event
will occur?
A.subjective probability
B.empirical probability
C.conditional probability
D.classical probability
Answer Key: D
1.0/ 1.0 Points
Question 3 of 25
The formal way to revise probabilities based on new information is to use:
A.common sense probabilities
B.unilateral probabilities
, C.complementary probabilities
D.conditional probabilities
Answer Key: D
Part 3 of 9 - 3.0/ 3.0 Points
1.0/ 1.0 Points
Question 4 of 25
Suppose that 50 identical batteries are being tested. After 8 hours of continuous use, assume that
a given battery is still operating with a probability of 0.70 and has failed with a probability of
0.30.
What is the probability that fewer than 40 batteries will last at least 8 hours?
A.0.0789
B.0.9598
C.0.7986
D.0.9211
Answer Key: D
1.0/ 1.0 Points
Question 5 of 25
Find the variance of the following probability distribution.
X P(X)
1 0.20
2 0.15
3 0.25
4 0.25
5 0.15
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