Milestone Review - Unit 5: Inferences - 7th Grade

A gym teacher at Jackson High School wants the school to have a new team sport: soccer, lacrosse, or rugby. She will take a survey to determine which of those sports most students prefer. Which population would provide a random sampling for the gym teacher to use?

• all students at the school who are sixteen years old

• all students who buy lunch at the school on Friday

• half of the students who play on team sports at the school

• every third student arriving at school

In a random sample of 40 Target shoppers, 18 of them said they stopped for coffee at Starbucks. If there are 90 shoppers who stopped for coffee, then how many people are shopping at Target?

• 8

• 200

• 40.5

• 41

The Bartow County game wardens want to keep track of the fish population in Lake Allatoona. The game wardens tag 35 fish in the lake. A week later, the game wardens catch 250 fish, and 7 of them have a tag. What is the best estimate for the fish population?

• 1

• 50

• 0.98

• 1,250

At the Atlanta Zoo, there were 1,116 people that visited the zoo on Friday. In a survey of 93 zoo visitors, 24 said they favor the gorilla exhibit. Based on the survey, how many people overall would likely favor the gorilla exhibit?

• 288

• 4,324.5

• 2

• 4,325

There are a total of 1,200 students at Cass Middle School. It is estimated that 20% of students prefer chocolate milk while eating lunch. How many chocolate milks should the lunchroom purchase in order to have enough for each student?

• 6,000

• 1.7

• 240

• 0.6

A souvenir coin company typically produces 750 souvenir coins with stamping errors each year. In a random sample of 400 coins, 3 have stamping errors. Estimate the total number of souvenir coins the company will produce this year.

• 1.6

• 5.625

• 6

• 100,000

A survey found that 4 out of 6 people in a community visit a chiropractor on a regular basis. If there are 3,420 people in the community, what is a reasonable prediction for the number of people who would visit a dentist on a regular basis?

• 5,130

• 2,280

• .007

• 3,420

A company plans to ship 3,000 computer chips to a local dealership. The company randomly selects 100 computer chips and finds that fifteen computer chips have the incorrect code. Based on this data, how many computer chips out of the 3,000 should be predicted to have an incorrect code?

• 450

• 20,000

• 2.25

• 150

At Atlanta Dance Academy there are 1,502 dancers. In May, the dancers got to pick their style of dance. Based on the results in the table, determine the number of dancers that picked the Fox Trot. Round to the nearest whole number.

• 195

• 11,515

• 196

• 1,502