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1. The probability of at least one head in two flips of a coin is
0.5
0.33
0.75
1.00
Question Type: Multiple Choice
2. Any process that generates well-defined outcomes is
an experiment
an event
a sample point
None of the answers is correct.
Question Type: Multiple Choice
3. __________ can be used to determine the percentage of data values that must be within one, two, and three standard deviations of the mean for data having a bell-shaped distribution.
box plot
five-number summary
empirical rule
Chebyshev's theorem
Question Type: Multiple Choice
4. If P(A) = 0.38, P(B) = 0.83, and P(A Ç B) = 0.57; then P(A È B) =
0.78
1.21
0.64
1.78
Question Type: Multiple Choice
5. The total number of data items with a value less than or equal to the upper limit for the class is given by the
cumulative frequency distribution
cumulative relative frequency distribution
relative frequency distribution
frequency distribution
Question Type: Multiple Choice
6. Assume your favorite football team has 2 games left to finish the season. The outcome of each game can be win, lose or tie. The number of possible outcomes is
4
6
2
None of the above
Question Type: Multiple Choice
7. In statistical experiments, each time the experiment is repeated
the same outcome must occur
the same outcome cannot occur again
a different outcome may occur
None of the above
Question Type: Multiple Choice
8. The probability of the intersection of two mutually exclusive events
must always be equal to 1
can be any positive value
can be any value between 0 to 1
must always be equal to 0
Question Type: Multiple Choice
9. Since the sun must rise tomorrow, then the probability of the sun rising tomorrow is
much larger than one
zero
infinity
None of the above
Question Type: Multiple Choice
10. Of the last 100 customers entering a computer shop, 25 have purchased a computer. If the classical method for computing probability is used, the probability that the next customer will purchase a computer is
1.00
0.75
0.25
0.50
Question Type: Multiple Choice
11. Given that event E has a probability of 0.25, the probability of the complement of event E
is 0.25
can have any value between zero and one
cannot be determined with the above information
must be 0.75
Question Type: Multiple Choice
12. If the data distribution is symmetric, the skewness is
1
0.5
None of the above
Question Type: Multiple Choice
13. Of five letters (A, B, C, D, and E), two letters are to be selected at random. How many possible selections are there?
20
7
10
50
Question Type: Multiple Choice
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