Jenny randomly selects 20 boxes of crayons from the shelf and finds two boxes with at least one broken crayon. If the shelf holds 130 boxes, how many would you expect to have at least one broken crayon?

A population is a collection of all individuals, objects, or measurements of interest.

A portion or part of a population is called a

a sample you get when you ask for volunteers

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?

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.

There are 600 students at Hilda’s school. Out of 30 students she surveys, 8 of them ride their bikes to school. Estimate how many students ride their bikes to school from the population.

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?

Part of the population of 4,500 elk at a wildlife preserve is infected with a parasite. A random sample of 50 elk shows that 8 of them are infected. How many elk are likely to be infected?