Statistics 20213 - Introduction to Statistics » Summer 2021 » Chapter 4 Quiz

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Question #1
Determine whether the events are mutually exclusive. Go to a formal dinner affair. Wear blue jeans.
A.   No
B.   Yes
Question #2
The probability of Barack hitting a homerun is one chance in fifty. What is the probability that he will not hit a homerun?
A.   49%
B.   1/50
C.   98%
D.   unknown since the events are mutually exclusive
Question #3
Find the indicated probability. The data set represents the income levels of the members of a country club. Find the probability that a randomly selected member earns at least $79,000. Round your answers to the nearest tenth. 99,000 119,000 69,000 129,000 74,000 99,000 79,000 59,000 149,000 199,000 64,000 89,000 139,000 74,000 119,000 109,000 79,000 159,000 54,000 109,000
A.   0.6
B.   0.4
C.   0.8
D.   0.7
Question #4
Determine whether the events are mutually exclusive. Read a book by Mark Twain. Read about Tom Sawyer.
A.   Yes
B.   No
Question #5
There are seven applicants for a job in the 20-29 age group, fourteen in their thirties, and four in the 40-49 age group. What is the probability that the person hired will be older than 29?
A.   1/25
B.   1/18
C.   7/25
D.   18/25

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