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1. 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
2. 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
3. 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
4. One of the basic requirements of probability is
both P(A) P(Ac) 1 and if there are kexperimental outcomes, then P(E1) P(E2) ... P(Ek) 1
both P(A) P(Ac) 1 and if there are kexperimental outcomes, then P(E1) P(E2) ... P(Ek) 1
P(A) P(Ac) 1
if there are kexperimental outcomes, then P(E1) P(E2) ... P(Ek) 1
Question Type: Multiple Choice
5. 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
6. 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
7. If the data distribution is symmetric, the skewness is
1
0.5
None of the above
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. 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
10. If P(A) = 0.85, P(A È B) = 0.72, and P(A Ç B) = 0.66, then P(B) =
0.28
0.15
0.53
0.15
Question Type: Multiple Choice
11. 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
12. An element of the sample space is
an outlier
a sample point
an event
an estimator
Question Type: Multiple Choice
13. 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
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