Sampling

Ms. Cassermere wants to know 7th grade students' favorite tv show. She picks 20 students to ask. How should Ms. Cassermere pick her sample?

• Pick 20 students, all in section 702

• Pick 20 students in Kindergarten

• Pick 20 girls

• Pick 20 students in 7th grade

The principal at Marina Middle School wants to determine if the 120 students in the seventh grade prefer to visit Catalina Island or Camp Mosaic for their end-of-year trip. Which of the following is a representative sample of the population? Select all that apply.

• 20 sixth-grade students, 20 seventh-grade students, and 20 eighth-grade students

• 10 seventh-grade boys and 10 seventh-grade girls

• 25 seventh-grade students

• 15 seventh-grade boys and 5 teachers

• 25 students from the school

Students in Mrs. Walsh’s math class wanted to know the favorite snacks of students in the school. How could they generate a random sample to survey?

• Line up the students by height and choose the first 20 students.

• Use the school roster and randomly choose 50 boys.

• Obtain an alphabetized list of all the students in the school and select every seventh student.

• Place all the names of the students in Mrs. Walsh's math class in a hat and randomly select 10 students.

_______ is a part of a group being surveyed.

• Sample

• Population

• Random Sample

• Quartile

A survey is conducted by randomly selecting 200 students out of 800 students in a school to find out their favorite sport. If 80 out of the 200 students chose soccer, estimate the total number of students in the school who would choose soccer as their favorite sport.

• 200

• 320

• 400

• 480

The sample represents the population.

Choose the answer that says "Representative Sample"

• Random Sample

• Biased Sample

• Representative Sample

7.SP.1

• A

• B

• C

• D

A survey is conducted by randomly selecting 150 students out of 750 students in a school to find out their favorite subject. If 60 out of the 150 students chose science, estimate the total number of students in the school who would choose science as their favorite subject.

• 200

• 300

• 400

• 500

The sample represents the population.

Choose the answer that says "Representative Sample"

• Random Sample

• Biased Sample

• Representative Sample

At Bedford Junior High, the 7th graders will conduct a survey for where to go on a field trip. Which method will result in the least biased decision?

• Randomly ask 8th grade students who went on a field trip last year

• Randomly choose some 7th grade students to select a location

• Ask all 7th grade teachers and administrators for a location

• Ask the student council to choose a location