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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. The probability of an intersection of two events is computed using the
subtraction law
addition law
multiplication law
division law
Question Type: Multiple Choice
3. If the data distribution is symmetric, the skewness is
1
0.5
None of the above
Question Type: Multiple Choice
4. 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
5. 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
6. 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
7. 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
8. 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
9. 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
10. 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
11. An experiment consists of tossing 4 coins successively. The number of sample points in this experiment is
8
16
4
2
Question Type: Multiple Choice
12. 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
13. 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
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