Inferences for Proportions

A middle school has 490 students. Mae surveys a random sample of 60 students and finds that 24 of them have dogs. How many students are likely to have dogs?

• 8 students

• 40 students

• 192 students

• 196 students

Part of the population of 10,800 hawks at a national park are building nests. A random sample of 72 hawks shows that 12 hawks are building nests. Estimate the number of hawks building a nest in the population.

• 1,800 hawks

• 150 hawks

• 432 hawks

• 10,800 hawks

A random sample of dogs at different animal shelters shows that 12 of 60 dogs are puppies. The cities shelters collectively house 1,200 dogs each year. Estimate how many are puppies.

• 50 puppies

• 240 puppies

• 20 puppies

• 600 puppies

Tags

CCSS.6.RP.A.3B

A manufacturer fills an order for 4,200 smart phones. The quality inspector selects a random sample of 60 phones and finds that 4 are defective. How many smart phones in the order are likely to be defective?

• 70 smart phones

• 900 smart phones

• 1,050 smart phones

• 280 smart phones

Are the two ratios proportional?

• YES

• NO

Tags

CCSS.7.RP.A.2A

Does this equation represent a proportional relationship?

• Yes

• No

Tags

CCSS.7.RP.A.2C

Is this a proportional equation?

• It is not proportional.

• It is proportional.

Tags

CCSS.7.RP.A.2C

A random sample of 120 ticket buyers is surveyed, and 28 buyers made their purchase on the first day tickets were being sold. How many of the 4,200 total tickets are likely to have been purchased on the first day they were available?

• 150 tickets

• 35 tickets

• 980 tickets

• 233 tickets

Solve the proportion:

• 15

• 5

• 10

• 12

Tags

CCSS.7.RP.A.2B

Is this graph Proportional or Non-Proportional

• Proportional

• Non-Proportional

Tags

CCSS.7.RP.A.2D