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1. __________ 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
2. 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
3. An element of the sample space is
an outlier
a sample point
an event
an estimator
Question Type: Multiple Choice
4. 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
5. A sample point refers to a(n)
individual outcome of an experiment
set of all possible experimental outcomes
numerical measure of the likelihood of the occurrence of an event
All of these answers are correct
Question Type: Multiple Choice
6. An important numerical measure of the shape of a distribution is the
skewness
correlation coefficient
relative location
variance
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. The union of events A and B is the event containing
all the sample points common to both A and B
all the sample points belonging to A or B
all the sample points belonging to A or B or both
all the sample points belonging to A or B, but not both
Question Type: Multiple Choice
9. 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
10. The probability of an intersection of two events is computed using the
subtraction law
addition law
multiplication law
division law
Question Type: Multiple Choice
11. The weights (in pounds) of a sample of 36 individuals were recorded and the following statistics were calculated mean = 160 range = 60 mode = 165 variance = 324 median = 170 The coefficient of variation equals
203.12%
11.25%
0.1125%
0.20312%
Question Type: Multiple Choice
12. If A and B are mutually exclusive, then
P(A) + P(B) = 1
P(A B) = 1
P(A) + P(B) = 0
P(A B) = 0
Question Type: Multiple Choice
13. 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
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