Algebra Statistics

I need help answering these algebra statistics questions! Thank you. They are all multiple choice!

X Brook Singleton’s Home Pa X ALG II B 2522: Statistics X
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Lesson 11: Statistics Unit Test
ALG II B 2522 Unit 6: Probability and Statistics
Assessment
(1 point)
10. Each person in a group of students was identified by year and asked when he or she preferred
taking classes in the morning, afternoon, or evening. The results are shown in the table. Find
the probability that the student preferred morning classes given he or she is a freshman. Round
your answer to the nearest thousandth.
Freshman
Sophomore Junior Senior
Morning
19
2
6
16
Afternoon
17
31
13
15
Evening
8
14
9
O 0.105
O 0.182
O 0.386
00.432
11. The probability that a dessert sold at a certain café contains chocolate is 75%. The probability (1 point)
that a dessert contains both chocolate and nuts is 23%. Find the probability that a randomly
chosen chocolate dessert contains nuts. Round to the nearest tenth of a percent.
O 30.7%
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Lesson 11: Statistics Unit Test
ALG II B 2522 Unit 6: Probability and Statistics
Assessment
11. The probability that a dessert sold at a certain café contains chocolate is 75%. The probability (1 point)
that a dessert contains both chocolate and nuts is 23%. Find the probability that a randomly
chosen chocolate dessert contains nuts. Round to the nearest tenth of a percent.
30.7%
O 32.6%
O 17.3%
O 31.7%
с
o
(1 point)
12. An airline has 82% of its flights depart on schedule. It has 65% of its flights depart and arrive
on schedule. Find the probability that a flight that departs on schedule also arrives on schedule.
Round the answer to two decimal places.
O 0.80
O0.17
O 0.53
00.79
13. The ages of two exercise groups at a local fitness center are listed below. (1 point)
Group A: 37, 36, 32, 41, 42, 36, 44, 45
Groun R. 26 40 38 36 42 40 40 36
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X Brook Singleton’s Home Pa X ALG II B 2522: Statistics X
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Lesson 11: Statistics Unit Test
ALG II B 2522 Unit 6: Probability and Statistics
Assessment
13. The ages of two exercise groups at a local fitness center are listed below. (1 point)
Group A: 37, 36, 32, 41, 42, 36, 44, 45
Group B: 26, 40, 38, 36, 42, 40, 40.36
Which statement about the data is true?
IC
lo
IR
The mean age is the same for both groups.
The range of ages is greater in Group A than in Group B.
O The mode of the ages for both groups is 36.
The median age is the same for both groups.
(1 point)
14. Stillwater Junior High divides students into teams taught by a group of teachers. The table
shows the number of students in each team.
E
Team
Number of Students
Acers
78
Blazers
80
P
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X Brook Singleton’s Home Pa X ALG II B 2522: Statistics X
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Lesson 11: Statistics Unit Test
ALG II B 2522 Unit 6: Probability and Statistics
Assessment
wwwwvwe we were sur www.
Team
Number of Students
Acers
78
|С
C
o
Blazers
80
Outbacks
83
Quasars
77
Voyagers
82
Total
400
The principal uses a computer to randomly select the name of a student from all the students in
the school. With the computer program, it is possible to draw the name of the same student
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X Brook Singleton’s Home Pa X ALG II B 2522: Statistics X
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Lesson 11: Statistics Unit Test
ALG II B 2522 Unit 6: Probability and Statistics
Assessment
The principal uses a computer to randomly select the name of a student from all the students in
the school. With the computer program, it is possible to draw the name of the same student
twice. If the principal selects the name of a student from the Blazers on the first try, what is the
probability she will draw the name of another student from the Blazers on the second try?
-100 -1%
79
399
1
80
15.
(1 point)
% of Respondents
40-
30-
20+
P
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