Quick Check Data & Statistics (6-10)

The dot plot shows the number of hours the students in Mr. Ross's class slept last night. Which of the following statements is not correct?

• There are a total of 17 students in Mr. Ross's class.

• Exactly 9 students slept for less than 8 hours.

• More than half of the students slept for at least 7 hours.

• All of the students in Mr. Ross's class need more sleep.

A survey of North Middle School staff included staff members ages. The ages were compiled and displayed in a histogram. Which of the following statements best describes the data?

• There are 12 staff members between the ages of 20-29.

• The number of staff members under the age of 40 is equal to the number of staff members 40 and older.

• Sixty staff members were included in the survey.

• A total of 10 staff members are 50 years or older.

The number of free throws made by the members of a basketball team are shown . Which best represents the data?

• 
• 
• 
• 

Employees were asked how many miles they traveled to work each day. The data is shown below in the box plot. The median is ​ (a)   and the IQR is ​ (b)   .

• 35
• 30
• 40
• 20
• 45

Mrs. Hamilton tallies her students test grades in the table below. If ​ (a)   students received an A and ​ (b)   students received a B, what percent of the class recieved an A or a B? ​ (c)  

• 7
• 5
• 40%
• 14
• 30%
• 4%