AnswersConcepts in Probability and StatisticsN/A

Practice Exam Answers

30 verified answers
1
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What is the mean, or average, high temperature for the week? [Blank 1] degrees

Answer:

52

2
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Which best describes the accuracy of Latricia’s solution?

A
Latricia’s solution is inaccurate. Her solution describes the probability of spinning an even number or a 3 in the same spin.
B
Latricia’s solution is inaccurate. Her solution uses the correct probability of spinning an even number, but it uses 3 fourths to describe the probability of spinning a 3 .
C
Latricia’s solution is inaccurate. Her solution uses the correct probability of spinning a 3 , but it uses 1 fourth to describe the probability of spinning an even number.
D
Latricia’s solution is accurate.
3

Which statement is true about whether cap A and cap b are independent events?

A
cap A and cap b are not independent events because cap p times open paren cap A divides cap b close paren is not equal to cap p times cap b .
B
cap A and cap b are independent events because cap p times open paren cap A divides cap b close paren is equal to cap p times cap A .
C
cap A and cap b are independent events because cap p times open paren cap A divides cap b close paren is equal to cap p times cap b .
D
cap A and cap b are not independent events because cap p times open paren cap A divides cap b close paren is not equal to cap p times cap A .
4

What is Dora’s error?

A
Dora should have divided by 4 when finding the mean.
B
Dora found the absolute deviation of 35 incorrectly.
C
Dora used only four numbers in finding the mean absolute deviation.
D
Dora used only four numbers in finding the mean.
5

The stem and leaf plot shows the number of calories in one serving for 12 different snack foods. How many snacks have 100 or more calories in one serving? [Blank 1] snacks

Answer:

8

6

Which statement correctly compares the measures of center of the data in the dot plots?

A
The median is greater for Mr. McIntyre’s class.
B
The mode is greater for Mrs. Ramos’s class.
C
The median is the same for both classes.
D
The mode is the same for both classes.
7

A local newspaper compiles data on the number of days, cap x , people in a neighborhood receive the newspaper. The probability distribution for the data is shown in the table. What is the probability that a randomly chosen person receives the newspaper at least one day per week?

A
41 percent
B
83 percent
C
33 percent
D
16 percent
8

Which statements are true? Choose three correct answers.

A
cap p times open paren the intersection of cap c and cap f close paren is equal to cap p times open paren the intersection of cap f and cap c close paren
B
cap p times open paren cap c divides cap f close paren is equal to 0 point 2 5
C
cap p times open paren cap f divides cap c close paren is equal to 0 point 7 5
D
cap p times open paren the intersection of cap c and cap f close paren is equal to 0 point 0 9
E
cap p times open paren cap c divides cap f close paren is equal to cap p times open paren cap f divides cap c close paren
9

What is the probability of spinning blue or green?

A
5 eighths
B
3 eighths
C
1 eighth
D
1 half
10

Which descriptions of a histogram are true? Choose five correct answers.

A
If the graph is symmetrical, the data is evenly distributed.
B
A peak is a bar that is higher than the other bars around it.
C
A peak is where the frequency is lowest.
D
A cluster is a group of bars, meaning the frequency is higher in these intervals.
E
Intervals on a histogram where there are no bars mean the frequency is 0.
F
If the graph is symmetrical, the data is clustered toward the right side.
G
A peak is a bar that is lower than the other bars around it.
H
A peak is where the frequency is the highest.
11

Mark noticed that his bus is late to school 5 percent of the time. He wants to design a spinner he can use to simulate the situation and determine the probability that the bus will be late three times next week. How should Mark divide his spinner to best simulate the situation?

A
15 equal-sized sections
B
5 equal-sized sections
C
2 equal-sized sections
D
20 equal-sized sections
12

Consider the following sets. cap u is equal to all triangles cap e is equal to x divides x is in cap u and x is equilateral cap i is equal to x divides x is in cap u and x is isosceles cap s is equal to x divides x is in cap u and x is scalene cap A is equal to x divides x is in cap u and x is acute cap o is equal to x divides x is in cap u and x is obtuse cap r is equal to x divides x is in cap u and x is right Which is a subset of cap i ?

A
cap s
B
cap A
C
cap r
D
cap e
13

Which describes dependent events?

A
drawing the ace of spades from a deck of cards, putting it back into the deck, and drawing the king of spades
B
drawing a blue marble and a yellow marble at the same time from a bag of marbles
C
rolling a six-sided number cube and getting an even number, then rolling the same six-sided number cube and getting an even number again
D
flipping two coins at the same time and getting heads on one and tails on the other
14

Students were asked how many hours they read in a week. Is this a good example of a statistical question? Why or why not?

A
No, this is not a good statistical question because there are a variety of answers that could be given.
B
Yes, this is a good statistical question because there are not a variety of answers that could be given.
C
Yes, this is a good statistical question because a variety of answers are given.
D
No, this is not a good statistical question because there are not a variety of answers that could be given.
15

What is the median of this set of data? 362, 187, 211, 298, 331, 250, 347, 199

Answer:

274

16

Herky found that 8 out of every 100 beans in his garden were nibbled by rabbits. How many beans can he expect to be damaged if there are 450 beans in his garden?

A
18 beans
B
108 beans
C
72 beans
D
36 beans
17

Miriam is visiting five friends in her neighborhood, Louise, Mike, Nicole, Oscar, and Pascal. In each arrangement, the first initial of each person’s name represents that person’s position as he or she is visited by Miriam. Which shows all the outcomes for this event if she visits with Nicole first and Louise last?

A
NMOPL, NOMPL, NPMOL
B
NLMOP, NMLOP, NOLMP
C
NMOPL, NMPOL, NOPML, NOMPL, NPMOL, NPOML
D
NLMOP, NLOMP, NMLOP, NMOLP, NOMNP, NONMP
18

What is the median in the box plot? Open image in full-screen view

Answer:

76

19

How many 2-letter combinations can be created from the distinct letters in the word “mathematician”? Assume that the order of the letters does not matter.

A
78
B
28
C
156
D
56
20

Jamaal knows that it is certain that he will win the election because he is the only person who is running for class treasurer. Which value represents the probability that he will win the election?

A
1 fourth
B
0
C
3 fourths
D
1

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