The conditional probability of event A given that event B has occurred is written as P(B
A).
A) True B) False
Q. 2In a box of 75 markers, 36 markers are either red or black and 15 are blue. Find the probability
that a randomly selected marker is red or black or blue.
A) .51 B) .68 C) .32 D) .24
Q. 3In a distribution that is skewed to the right, what is the relationship of the mean, median, and
mode?
A) mode > mean > median B) median > mean > mode
C) mean > median > mode D) mode > median > mode
Q. 4In a box of 50 markers, 30 markers are either red or black and 20 are missing their caps. If 12
markers are either red or black and are missing their caps, find the probability that a randomly
selected marker is red or black or is missing its cap.
A) .38 B) 1 C) .24 D) .76
Q. 5The output below displays the mean and median for the state high school dropout rates in year 1
and in year 5.
Year 1 Year 5
N 51 51
MEAN 28.94 26.53
MEDIAN 27.78 25.64
Interpret the year 5 median dropout rate of 25.64.
A) Half of the 51 states had a dropout rate below 25.64.
B) The most frequently observed dropout rate of the 51 states was 25.64.
C) Half of the 51 states had a dropout rate of 25.64.
D) Most of the 51 states had a dropout rate close to 25.64.
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