MAAP Statistics and Probability Review

Mrs. Johnson is the principal of the middle school. She is taking a survey of students to see if there is interest in starting a 7th grade chess club. Which sampling method would likely provide the best representative sample of the students?

• Survey every 5th seventh grader who walks into the school building

• Survey every seventh grader on the football team

• Survey half of the parents of the 7th graders

• Survey every 3rd person who walks into Mrs. Johnson's office

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Conrad wants to conduct a survey of students at his middle school to determine which sports they prefer to play. Which two survey methods would likely generate fair and impartial results?

• Ask 30 members of the football team

• Ask 20 students entering a basketball game

• Ask 50 people entering the cafeteria

• Ask 10 students from a 7th grade class

• Ask 120 randomly-selected students

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Myrtle wants to determine the favorite movie among students at her school. Which sampling method would most likely provide a representative sample of the students at Myrtle's school?

• Survey fifteen players chosen randomly from each sports team

• Survey fifteen students chosen randomly from students who are in art class

• Survey fifteen students in the eighth grade

• Survey fifteen students chosen randomly from each grade

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Neil's school has a total enrollment of 360 students. For a school project, Neil surveyed 72 of his fellow students. He asked each student to name his or her favorite color. The results are shown in the table below.

After examining his results, Neil made the following conclusions. Select all valid conclusions based on his survey results.

• 10 of the 360 total students were likely to select yellow as their favorite color.

• 115 of the 360 total students were likely to select blue as their favorite color.

• Three times as many students would probably choose yellow rather than pink as their favorite color.

• 70 students of the 360 total students would likely choose orange.

• 11 students out of the 360 total students would likely choose green as their favorite color.

Tags

CCSS.7.SP.A.2

A random sample of 50 students at Grand Ridge Middle School were surveyed about their favorite color. Of those 50 students, 15 chose orange and 10 chose purple. In total, 300 students attend Grand Ridge Middle School.

Based on this sample survey, approximately how many students at Grand Ridge Middle School prefer the color orange?

Tags

CCSS.7.SP.A.2

A random sample of 50 students at Grand Ridge Middle School were surveyed about their favorite color. Of those 50 students, 15 chose orange and 10 chose purple. In total, 300 students attend Grand Ridge Middle School.

Based on this sample survey, approximately how many students at Grand Ridge Middle School prefer the color purple?

Tags

CCSS.7.SP.A.2

A company manufactures microwave ovens. In February, a random sample of 50 microwave ovens were inspected, and 4 were found to be defective. The company manufactured 3,200 microwave ovens in February.

Based on the results from the sample, about how many microwave ovens are expected to be defective?

• 63 microwave ovens

• 200 microwave ovens

• 256 microwave ovens

• 800 microwave ovens

Tags

CCSS.7.SP.A.2

A random sample of 35 students found that 5 out of 7 students ride the bus to school. At this rate, how many students would ride the bus to school if 385 students were in attendance?

Tags

CCSS.6.RP.A.3B

Every coach and every athlete on the Douglas High School track team recorded how many miles they ran last week. The box plots compare the miles run by the coaches and athletes on the team. Refer to the diagram below. The median number of miles run by the athletes was how much greater than the median number of miles run by the coaches last week?

• A. 2 miles

• B. 3 miles

• C. 4 miles

• D. 5 miles

The ages of members of the basketball and baseball teams at a middle school are given in the table below. What is the difference between the average age of students on the basketball team and the average age of students on the baseball team?