Making Predictions with Random Samples Proportions

Our high school students council surveyed 80 out of 450 students and asked how they feel about starting school later. 56 students said they would like to start school later. Predict the number of students that would like to start school later.

• 255 students

• 285 students

• 300 students

• 315 students

The mall sent a survey to 560 people. They found that 46 out of 108 people said they would shop at the mall if it opened this weekend. Predict the number of people who would shop at the mall.

• 189 people

• 204 people

• 230 people

• 239 people

A group of people were asked about their favorite types of pants. Predict how many people out of 150 would say jeans are their favorite.

• 150

• 50

• 25

• 75

A group of people were asked about their favorite types of pants. Predict how many people out of 300 would say capris are their favorite.

• 300

• 90

• 15

• 50

A group was surveyed and asked about their favorite sport.  Predict how many people would chose football if there are 600 students in the school.

• 150

• 180

• 450

• 600

A group was surveyed and asked about their favorite sport.  Predict how many people would chose baseball/softball if there are 300 students in the school.

• 36

• 64

• 70

• 72

Q1. How many red shirts do you have?

• A) 5 red shirts

• B) 17 red shirts

• C) 40 red shirts

• D) 83 red shirts

There are 400 students at Polly's school. She surveyed a random sample of 80 students to find their favorite hobby. 19 said they like to read. 30 said they like to be with friends. 8 said they like to do crafts. 23 said they like to play sports. Polly infers that doing crafts is the least popular hobby at her school. Refer to the data table. Polly surveys two more samples. Do the results from these samples support the inference made from the first sample?

• Yes, the survey results support the inference that doing crafts is the least popular hobby at Polly's school.

• No, the survey results does not support the inference that doing crafts is the least popular hobby at Polly's school.

Litzy collects data from a random sample of 7th graders. Out of 40 respondents, 7 attend afterschool programs. Of the 200 7th graders attending Litzy's school, how many would be expected to attend afterschool programs?

• 14 7th graders

• 28 7th graders

• 35 7th graders

• 42 7th graders

A random sample of 50 was taken from a shipment of 12,000 light bulbs. There were 2 broken bulbs in the sample. How many broken bulbs would you expect in the entire shipment?

• 240

• 480

• 2,400

• 4,800