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Range and Interquartile Range — Unit test Answers

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1
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What is the center of the data?Number of Green Candies in a BagThe center is

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2
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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

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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.
3

Consider the two data sets below:Data Set 1: 19, 25, 35, 38, 41, 49, 50, 52, 59Data Set 2: 19, 25, 35, 38, 41, 49, 50, 52, 99Which of the following statements is true?

A
The values are not in order.
B
The data sets will have different values for their interquartile range.
C
The data sets will have the same values for their interquartile range.
D
An outlier will have no effect on the range.
4

Which is a statistical question that you can ask to learn about your classmates’ favorite movie?

A
What is your favorite movie?
B
What is Mr. Maddox’s favorite movie?
C
How many students like The Lord of the Rings as their favorite movie?
D
How many students own the movie The Lord of the Rings?
5

Which dot plot is symmetric?

A
Number of Correct Answers on the Quiz
Option A
B
Number of Correct Answers on the Quiz
Option B
C
Number of Correct Answers on the Quiz
Option C
D
Number of Correct Answers on the Quiz
Option D
6

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.
7

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

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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.
8

Sydney’s teacher says she may have her report card percentage based on either the mean or the median and she can drop one test score if she chooses. 94%, 84%, 100%, 68%Which measure of center should Sydney choose so she can have the highest percentage possible?

A
Sydney should choose the mean after dropping one test score.
B
Sydney should choose the mean without dropping one test score.
C
Sydney should choose the median after dropping one test score.
D
Sydney should choose the median without dropping one test score.
9

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.
10

What is the spread of the data in the dot plot?Number of Apples in Each Bag

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A
from 0 to 5
B
from 10 to 15
C
from 12 to 15
D
from 0 to 6
11

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.
12

The high temperatures in Montana are recorded for a week. High TemperaturesSunday46°FMonday52°FTuesday51°FWednesday54°FThursday49°FFriday51°FSaturday61°FWhat is the mean, or average, high temperature for the week?

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13

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

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14

Jacob has golf scores of 120, 112, 130, 128, and 124. He wants to have a mean, or average, golf score of 118. What score does he need in his next golf game to achieve this mean score?

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15

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?

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