Unit 12 Review

1. Which question is a statistical question?

• How many students went to the dance?

• How tall is Maddy?

• How old are the students in your class?

• Who is the oldest in your class?

2. When describing a graph, what is the outlier?

• A data point farthest from the majority of points

• A space between the majority of data and a point

• The highest point on a graph

• A set of data points that are grouped closely together on a graph

3. Find the median of the data set

54, 25, 31, 88, 24, 56, 73, 96

4. Each day, a golf course surveys golfers to find out the number of golf balls that

were lost on the course. The frequency table shows the data collected since the

beginning of the year. Make a histogram of the data.

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5. The table shows the number of stories in eight buildings. Which statement about the data is true?

• The mode is greater than the mean

• There are no outliers

• The mode best describes the data

• The mean is less than the median

6. Choose all of the questions that are statistical questions.

• What is the quantity of each type of candy in the store?

• How much candy was purchased in one week?

• How many of each type of candy were purchased in the last wee?

• How many pounds of candy was purchased by each: children, teens, and adults>

• How many different candies are in the store?

7. The table shows the number of minutes that Mary spent working on

her math homework each day this week.

Which value is the LEAST accurate description of the center of

Mary's data set? Why?

• The median of the data values for Monday, Tuesday, Wednesday, and Thursday; this median will describe only four of the data values

• The mean of the data set; the outlier 10 will cause the mean to

  be less than most of the data values.

• The median of the data set; the outlier 10 will cause the median

  to be less than most of the data values.

• The mean of the data values for Monday, Tuesday, Wednesday,

  and Thursday; this mean will describe only four of the data

  values.

8. If the value 75 is added to the data in the line plot, which will show

a greater change–the median of the data set or the mean of the

data set? How do you know?

• Adding 75 will change the median more than the mean. The

  median is greatly affected by outliers, while the mean is not.

• Adding 75 will change the median more than the mean. Adding

  another value makes the set have an odd number of values, so

  the median will show a greater change.

• Adding 75 will change the mean more than the median. The

  mean is greatly affected by outliers, while the median is not.

• Adding 75 will change the mean more than the median. Adding

  another value makes the set have an odd number of values, so

  the mean will show a greater change.

9. A number of pet owners were surveyed.

Number of pets owned: 2, 3, 5, 1, 7, 2, 3, 6, 1, 1, 2, 4, 9, 1, 2, 1, 6

Which dot plot represents the data?

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10. The line plot shows the number of books 12 students read in

Ms.Hale's book club during the summer. Which measure of central

tendency best describes the data? Justify your answer.

• The modes are 3 and 5. The mode best describes the data set

  because it represents half of the people.

• The range is 9. The range best describes the data set because it

  represents the spread of the data.

• The mean is 6. The mean best describes the data set because

  most people read less than 6 books.

• The median is 5. The median best describes the data set

  because a majority of people read 5 books.