Using Samples to Make Predictions

A real estate agent surveys people about their housing preferences at an open house for a luxury townhouse.

To evaluate the defect rate of its memory chips, an integrated circuit manufacturer tests every 100th chip off the production line.

Mr. Roy surveyed 60 students to find out their favorite day of the school week. If there are 550 students in the school, predict how many enjoy Fanny Pack Friday the most.

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?

Timothy School District surveyed a random sample of 60 middle school students about the amount of time they watch TV. Of the students surveyed, 14 average watching more than 4 hours of TV each day. There are 1143 middle school students in the Timothy School District.

Based on the data, how many students in the whole district watch 4 hours of TV each day?

***Set up two equal proportions to solve!

***Round your answer!