Unit 5 Review

A new restaurant in town is surveying residents to determine how much they typically pay for a meal out. Which of the following best describes a random sample?

• They go door-to-door in a nearby neighborhood.

• They randomly select 50 residents of a local nursing home.

• They call 200 randomly selected town residents.

• They ask patrons if the price is reasonable.

The elementary school cafeteria is considering changing the menu from pizza to sub sandwiches. Which of the following best describes a random sample?

• All the students in Mrs. Johnson's class are surveyed.

• Twenty randomly selected fifth graders are surveyed.

• Fifty randomly selected staff members are surveyed.

• Fifty students' names are drawn from a hat.

A sample of students is taken from the school's A honor roll. The school estimates that there are 360 students on the A honor roll. Using this sample, how many students on the A honor roll are in 8th grade?

If there are 360 students on the A honor roll, how many students are 7th graders?

A streaming service randomly selected 100 of its subscribers and asked them how many hours of shows they watch per week. Of those surveyed, 45 watch more than 10 hours per week. Based on the data, if the company has 2,500 subscribers, how many watch more than 10 hours a week?

• 400

• 1,125

• 1,400

• 800

The list below shows the allowance earned by eight of the students in Ms. Tomas's class. What is the mean allowance earned in Ms. Tomas's class?

$7, $12, $8.50, $10, $7, $8, $10.50, $11

The data set represents the number of minutes 20 students spent reading at home. What is the mean?

The data set represents the number of minutes 20 students spent reading at home. What is the median?

The data represent the number of student absences at Southwinds High School each week for the past 10 weeks. What is the first quartile?

The data represent the number of student absences at Southwinds High School each week for the past 10 weeks. What is the third quartile?