AnswersCA-Mathematics I B-CRBox Plots

Box Plots — Unit test Answers

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1
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Which descriptions of a histogram are true? Check all that apply..

A
A peak is a bar that is lower than the other bars around it.
B
A peak is where the frequency is lowest.
C
A peak is where the frequency is the highest.
D
A cluster is a group of bars, meaning the frequency is higher in these intervals.
E
A peak is a bar that is higher than the other bars around it.
F
Intervals on a histogram where there are no bars mean the frequency is 0.
G
If the graph is symmetrical, the data is clustered toward the right side.
H
If the graph is symmetrical, the data is evenly distributed.
2
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Mrs. Barnes recorded the grades her students earned on the last chapter test in the frequency table below.The frequency table will be used to make a histogram. Test ScoreNumber of Students31 - 40141 - 50251 - 60461 - 70671 - 801181 - 90591 - 1004Which chart has the correct setup for Mrs. Barnes’ histogram?

A
A 2-column table with 4 rows titled Mrs. Barnes's Histogram. Column 1 has entries interval used, appropriate scale, vertical axis represents, horizontal axis represents. Column 2 has entries 10, 31 to 100, number of students, test scores.
Option A
B
A 2-column table with 4 rows titled Mrs. Barnes's Histogram. Column 1 has entries interval used, appropriate scale, vertical axis represents, horizontal axis represents. Column 2 has entries 10, 0 to 12, number of students, test scores.
Option B
C
A 2-column table with 4 rows titled Mrs. Barnes's Histogram. Column 1 has entries interval used, appropriate scale, vertical axis represents, horizontal axis represents. Column 2 has entries 7, 0 to 12, test scores, number of students.
Option C
D
A 2-column table with 4 rows titled Mrs. Barnes's Histogram. Column 1 has entries interval used, appropriate scale, vertical axis represents, horizontal axis represents. Column 2 has entries 7, 31 to 100, test scores, number of students.
Option D
3

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
Yes, this is a good statistical question because a variety of answers are given.
B
Yes, this is a good statistical question because there are not a variety of answers that could be given.
C
No, this is not a good statistical question because there are not a variety of answers that could be given.
D
No, this is not a good statistical question because there are a variety of answers that could be given.
4

Maria made a histogram to represent her jogging miles.The height of the bars in the histogram represent

Question illustration
A
the number of runs Maria jogged in each range of miles.
B
the number of marathons Maria entered.
C
the number of days Maria jogged that week.
D
the number of weeks Maria jogged.
5

The data set represents the number of minutes Dan spent on his homework each night.30, 35, 35, 45, 46, 46, 52, 55, 57Which box plot correctly represents the data?

A
A number line goes from 30 to 58. The whiskers range from 30 to 57, and the box ranges from 35 to 53. A line divides the box at 46.
Option A
B
A number line goes from 30 to 58. The whiskers range from 30 to 57, and the box ranges from 35 to 52. A line divides the box at 46.
Option B
C
A number line goes from 30 to 58. The whiskers range from 30 to 57, and the box ranges from 35 to 55. A line divides the box at 46.
Option C
D
A number line goes from 30 to 58. The whiskers range from 30 to 57, and the box ranges from 35 to 55. A line divides the box at 45.
Option D
6

What is the range of this set of data? 111, 97, 63, 84, 100, 119, 72

Answer not available
7

Between which two values would 75% of the data represented on a box plot lie? Check all that apply.

A
the median and the maximum
B
the lower quartile and the maximum
C
the lower quartile and the upper quartile
D
the minimum and the upper quartile
E
the minimum and the maximum
F
the median and the upper quartile
8

What is the median of this set of data? 100, 102, 103, 106, 109

A
100
B
103
C
106
D
109
9

A data set has a median of 12, an upper quartile of 15, a lower quartile of 10, a minimum of 4, and a maximum of 20. Which statement is true of the box plot of this data set?

A
The box will go from 10 to 12.
B
A line dividing the box will be at 12.
C
The left whisker will go from 4 to 15.
D
The right whisker will go from 12 to 20.
10

Jacob has golf scores of 120, 112, 130, 128, and 124. He wants to have an average golf score of 118. What is the first step in determining what Jacob needs to score in his next golf game?

A
Find the sum of all the numbers in the problem, .
Option A
B
Find the average score for the five golf games that Jacob has played.
C
Determine the number of points that he needs in his next golf game.
D
Determine how many total points are needed to have an average of 118.
11

A weekly report for new agents at a vacation sales company is shown in the histogram.How many of the new agents sold more than 10 vacation packages?

Question illustration
Answer not available
12

Two students were asked if they liked to read. Is this a good example of a statistical question? Why or why not?

A
Yes, this is a good statistical question because a variety of answers are given.
B
Yes, this is a good statistical question because there are not a variety of answers that could be given.
C
No, this is not a good statistical question because there are not a variety of answers that could be given.
D
No, this is not a good statistical question because there are a variety of answers that could be given.
13

Use the data on the dot plot to answer the question. How many people read for more than three hours last week?

Question illustration
Answer not available
14

The dot plot shows how Mr. Ruda’s class scored on a 5-point math quiz. Mr. Ruda described the data as having a spread from 0 to 5, a center of 3, two clusters, and a peak at 5. Where did Mr. Ruda make an error?Scores on the Math Quiz

Question illustration
A
The spread is from 0 to 8.
B
The center is at 2.
C
There is only one cluster.
D
The peak is at 8.
15

Dora calculated the mean absolute deviation for the data set 35, 16, 23, 42, and 19. Her work is shown below.Step 1: Find the mean. Step 2: Find each absolute deviation. 8, 11, 4, 15, 8Step 3: Find the mean absolute deviation. What is Dora’s error?

Question illustration
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.
D
Dora used only four numbers in finding the mean absolute deviation.

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