Review test 2- Statistics -Math 1342 - Spring 2017 - Houston Community College
Name___________________________________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) For the data set below, find the first quartile.
A)
65
1)
B) 63
C)
75
D)
50
2) Indicate which student has the higher z score.
Art Major
X = 46
X = 50.5
2)
s = 5.2
Theater Major
X = 70 X = 75.1 s = 7.3
A) The art major has a higher score than the theater major.
B) Neither student received a positive score; therefore, the higher score cannot be
determined.
C) The theater major has a higher score than the art major.
D) Both students have the same score.
3) Using the table below, what grade would a student who ranked in the 50th percentile
receive.
Grade
A
B
C
D
F
A) C
Class Boundaries
89.5-99.5
79.5-89.5
69.5-79.5
59.5-69.5
49.5-59.5
B) D
Frequency
4
7
11
3
3
C) B
D)
F
4) The average weekly earnings in dollars for various industries are listed below. Find the
percentile rank of 683.
755, 683, 604, 706, 649, 729, 800, 547, 821, 851
A) 35th
B) 40th
C) 25th
D)
19
B) 193.5
C)
1
165
4)
45th
5) For the data set below, find the upper outlier boundary.
A)
3)
5)
D)
199
6) Which plot below has a five-number summary of 5, 6, 11, 12, 13 and an interquartile
6)
range of 5?
A)
B)
C)
D)
7) Nanette must pass through three doors as she walks from her company's foyer to her
7)
office. Each of these doors may be locked or unlocked.
Let A be the event that all three doors are in the same condition. List the outcomes of
A. [Let "L" designate "locked" and U" designate "unlocked".]
A) {LLL}
B) {LLL, UUU}
C) {LLL, LLU, LUL, LUU, ULL, ULU, UUL, UUU}
D) None of these.
8) If the probability that it will rain tomorrow is 0.39, what is the probability that it will not
rain tomorrow?
A) 1.39
B) -0.39
C)
2
0.61
D)
0.39
8)
9)
If two dice are rolled one time, find the probability of getting a sum of 6.
1
1
7
5
A)
B)
C)
D)
12
6
36
36
9)
10) There are 28,446 undergraduate students enrolled at a certain university. The age
10)
distribution
is as follows:
Age Range Number
13 - 14
5
15 - 17
434
18 - 22
12,057
23 - 30
9256
31 and up
6694
Total
28,446
What is the probability that a student is less than 18 years old?
A) 0.0154
B) 0.00018
C) 0.0153
D)
0.235
11) If one card is drawn from an ordinary deck of cards, what is the probability that the card
will be an ace, a king of hearts, or a spade?
9
17
A)
B)
26
52
C)
11
26
D)
11)
19
52
12) Let E be the event that a corn crop has an infestation of ear worms, and let B be the event
12)
that a corn crop has an infestation of corn borers.
Suppose that P(E) = 0.24, P(B) = 0.16, and P(E and B) = 0.13. Find the probability that a
corn crop has either an ear worm infestation, a corn borer infestation, or both.
A) 0.6
B) 0.53
C) 0.13
D) 0.27
13) In a recent semester at a local university, 500 students enrolled in both General
13)
Chemistry and Calculus I. Of these students, 66 received an A in general chemistry, 73
received an A in calculus, and 33 received an A in both general chemistry and calculus.
Find the probability that a randomly chosen student received an A in general chemistry or
calculus or both.
A) 0.344
B) 0.212
C) 0.278
D) 0.763
14) Let A
and B be events with P(A) = 0.7, P(B) = 0.3, and P(B|A) = 0.2. Find P(A and B).
0.06
A)
B) 0.29
C) 0.21
D) 0.14
3
14)
15) A fast-food restaurant chain has 633 outlets in the United States. The following table
15)
categorizes them by city population and location and presents the number of outlets in
each category. An outlet is chosen at random from the 633 to test market a new menu.
Region
Population
of city
Under 50,000
50,000 - 500,000
Over 500,000
NE
28
58
79
SE
30
46
125
SW NW
31
22
54
42
74
44
Given that the outlet is located in a city with a population under 50,000, what is the
probability that it is in the Southwest?
A) 0.175
B) 0.049
C) 0.27
D) 0.279
16) In a second grade class containing 15 girls and 11 boys, 2 students are selected at random
to give out the math papers. What is the probability that the second student chosen is a
boy, given that the first one was a girl?
11
11
15 11
15 3
A)
B)
C)
D)
26
25
26 25
26 5
4
16)
Answer Key
Testname: REVIEW TEST 2
1) A
2) C
3) A
4) A
5) B
6) D
7) B
8) C
9) D
10) A
11) B
12) D
13) B
14) D
15) D
16) B
5