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1. If the data distribution is symmetric, the skewness is
1
0.5
None of the above
Question Type: Multiple Choice
2. 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
3. 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
4. A(n) __________ is a graphical representation in which the sample space is represented by a rectangle and events are represented as circles.
histogram
frequency polygon
tree diagram
Venn diagram
Question Type: Multiple Choice
5. A lottery is conducted using three urns. Each urn contains chips numbered from 0 to 9. One chip is selected at random from each urn. The total number of sample points in the sample space is
1000
100
30
729
Question Type: Multiple Choice
6. 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
7. The collection of all possible sample points in an experiment is
the population
a sample point
the sample space
an experiment
Question Type: Multiple Choice
8. __________ 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
9. A researcher has collected the following sample data. The mean of the sample is 5. 3 5 12 3 2 The coefficient of variation is
72.66%
264%
81.24%
330%
Question Type: Multiple Choice
10. Two events are mutually exclusive if
the probability of their intersection is 1
they have no sample points in common
the probability of their intersection is 0.5
the probability of their intersection is 1 and they have no sample points in common
Question Type: Multiple Choice
11. 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
12. 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
13. 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
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