Mod 9 test review

The students in the 7^th grade band class are selling raffle tickets. The number of tickets each student sold this week were: 11, 12, 14, 16, 20, 20, 22, 24, 25, 27, 30, 32, 34, 35, 35, and 36. Which display is best to show the variation in the lowest 25% of sales?

• bar chart

• box plot

• circle graph

• line plot

Karrie surveyed people to find their favorite hat color. She is making a circle graph of the data. What is the measure in degrees of the central angle in the graph for the people that chose brown?

Simon collected data on vehicles passing a certain location for 24 hours. He created a circle graph to show the results. The central angle for the portion of the graph that represents trucks measures 40 degrees. If 18 trucks were recorded, how many vehicles passed the location?

___ vehicles

The manager of the school bookstore needs to order school shirts to restock the shelves. In order to determine how many of each kind to purchase, she randomly surveys 50 students and faculty members who plan to buy shirts about which type of shirt they would buy.

A language arts teacher at North Middle School conducts a random survey of the student body and finds that 12% of the students would be interested in a summer creative writing program if it were offered. If there are 700 students in the school, how many of them should the teacher predict will participate in the program?

• 12 students

• 84 students

• 140 students

• 168 students

In order to analyze how much time middle school students typically spend playing outside each day during the summer, a teacher takes 21 random samples of 25 students each. The graph shows the mean of each sample. What is the most appropriate measure of center?

• mean

• median

• range

• IQR

The circle graph shows the results of a survey about which vegetable was most liked. If  500 people were surveyed, how many more people liked carrots than peas?

• 75

• 100

• 125

• 150

A car salesman is displaying data from the previous week’s total vehicle sales. Which display is best to show the total sales for each different type of cars?

• bar graph

• box plot

• circle graph

• line plot

The stem-and-leaf plot shows the length in inches of different snakes found on a ranch. The rancher wants to show how spread out the lengths are. Which measure of variation best represents the data?

• mean

• median

• IQR

• range

The table shows the weights in pounds of different animals weighed at the kennel this week. Which of these are the appropriate measures of center and variation for this data?

• range & IQR

• mean & range

• median & IQR

• mean & median