GCSE Secondary Maths Age 13-17 - Probability & Statistics: Sampling Data - Explained

Kate is organizing a school party and needs to order pizzas. She surveys 60 students to determine their pizza preferences, finding that 20 prefer ham pizza. Assuming this sample represents the entire school of 1200 students, she calculates that 400 students would want ham pizza. The video discusses the assumption that the sample is representative and how this might affect the accuracy of the order.

How many students in Kate's survey preferred Salami pizza?

• 17

• 8

• 15

• 20

What fraction of the surveyed students chose Ham pizza?

• 1/4

• 1/3

• 1/2

• 1/5

How many Ham pizzas should Kate order based on her calculations?

• 400

• 600

• 300

• 500

What assumption did Kate make about her sample of students?

• The sample is representative of the whole school.

• All students prefer the same type of pizza.

• Only her friends were surveyed.

• The sample size is too large.

Why might Kate's assumption about the sample be incorrect?

• The sample was taken on a holiday.

• The sample size is too small.

• The sample might not represent the entire school.

• All students have the same taste.