Unit 10 Data and Statistics

Make a Stem and Leaf Plot to represent the test scores on the line plot pictured.

• A

• B

Students were asked how many hours they spend each weekend playing video games. The histogram shown represents the results. Based on the histogram, which statement is true?

• A total of 9 students were surveyed.

• Five students spend less than 10 hours on video games each weekend.

• More students spend from 0 to 15 hours playing video games.

• Fifteen students surveyed spend more than 15 hours per weekend on video games.

The dot plot shows the number of books students read last summer. Which statement best describes the data shown in the dot plot?

• The data distribution has one gap.

• The data distribution is symmetrical.

• The peak of the data is at 6.

• The data are clustered from 4 to 9.

Make a single horizontal bar graph using percentages from the data in the table shown. Represent Hockey with purple, Badminton with red, and Football with green. Be sure to write your percentage totals on each colored section.

• A

• B

Which statement about the data in the histogram is true?

• The distribution of the data is asymmetrical, so the mean and the median are likely

  outside the "3-4" category.

• The distribution of the data is asymmetrical, so the mean and the median are likely

  within the "3-4" category.

• The distribution of the data is symmetrical, so the mean and the median are likely

  outside the "3-4" category.

• The distribution of the data is symmetrical, so the mean and the median are likely

  within the "3-4" category.

Wendell surveyed the 15 members of the high school soccer team and asked how many years of soccer they had played.  The results are shown in the line plot.

Which of the following statements is true?

• A.  The spread of the data is 5 with a peak at 10.

• B.  The spread of the data is 5 with a peak at 12.

• C.  The spread of the data is 12 with a peak at 10.

• D.  The spread of the data is 12 with a peak at 12.

Mia recorded the scores she earned for each math homework assignment during the year, then represented that data on a box plot, which is shown.

What is the median score Mia earned on math homework?

• A.  50

• B.  60

• C.  80

• D.  90

Daphne is a full-time college student who works part-time as a server in a restaurant on the weekends.  The amount of money she made as tips for the last eight evenings she worked is shown in the table.

How much money did Daphne earn in tips each night, on average?

Answer explanation

Average is the synonym for mean. Add up all the values then divide by the number of values.

Tags

CCSS.7.EE.B.3

Daphne is a full-time college student who works part-time as a server in a restaurant on the weekends.  The amount of money she made as tips for the last eight evenings she worked is shown in the table.

What was the median amount of tips Daphne earned those eight nights?

Rocco recorded how many miles he drove each day for two weeks.  During that time he drove to work most days and took a couple of trips. Which measure of center best represents the typical amount of daily driving he did during this time, and why?

• The mean is best because the number of data points is small.

• The median is best because the number of data points is small.

• The mean is best because there are outliers in the data set.

• The median is best because there are outliers in the data set.

Answer explanation

Measure of center is referring to the mean and median.