population inferences

Mr. Ortega wants to know 1st periods favorite food. He picks 10 students in 1st period to ask.

What is the sample?

• All students at HPMS

• All students in 1st period

• The 10 students Mr. Ortega picks

• All students in 7th grade

Mr. Ortega wants to know section 2nd periods favorite food. He picks 10 students in 2nd period to ask.

What is the population?

• All students at HPMS

• All students in 2nd period

• The 10 students Mr. Ortega picks

• All students in 7th grade

Ms. Morris wants to know 7th grade students' favorite tv show. She picks 20 students to ask.

What is the population?

• All students at HPMS

• All students in her class

• The 20 students who get picked

• All students in 7th grade

Ms. Cassermere wants to know 7th grade students' favorite tv show. She picks 20 students to ask.

What is the sample?

• All students at Commodore

• All students in 701

• The 20 students who get picked

• All students in 7th grade

• 15

• 27

• 45

• 75

Anthony opened a new store and wants to conduct a survey to determine the best store hours. Which is the best representative sample?

• A group of randomly selected people who come to the store in one week.

• A group of randomly selected people who visit his website on one night.

• Every person he meets at his health club one night.

• The first 20 people who walk into his store one day.

100 second graders were asked to do a book report about one of these four zoo animals.  The number of students who chose each animal is shown in the table.  If 250 second graders had to choose of of the four animals, predict how many would choose to write about a giraffe.

• 60 students
• 50 students
• 40 students
• 30 students

Tags

CCSS.7.RP.A.2C

150 people were polled on their favorite sport.  Based on the table, if you asked only 25 people what their favorite sport is, how many would say soccer is their favorite sport?

• 5 people
• 6 people
• 8 people
• 10 people

Tags

CCSS.7.RP.A.3

• 2

• 4

• 8

• 16

Tags

CCSS.7.RP.A.3

An automobile dealer decides to select a month for its annual sale.  Find the probability that it will be September or October.

• 1/12
• 1/6
• 1/4
• 5/6