Lesson 23 QUIZ worksheet

Marcus has three random samples of the same size from a population of 700 people. In one sample, 53% of people have a library card. In another, 51% of people have a library card. In the third, 43% have a library card. Based on the three samples, how many people with a library card should he expect are in the population?

• A) 301

• B) 343

• C) 357

• D) 371

Tags

CCSS.7.SP.A.2

A school secretary plans to order 510 sandwiches for a school picnic. He asks 85 randomly selected students which type of sandwich is their favorite. Based on the data from the sample, how many peanut butter should the secretary order? Show your work.

• 123

• 309

• 222

• 45

Tags

CCSS.7.SP.A.2

A school secretary plans to order 510 sandwiches for a school picnic. He asks 85 randomly selected students which type of sandwich is their favorite. Based on the data from the sample, how many ham should the secretary order? Show your work.

• 123

• 108

• 228

• 45

Tags

CCSS.7.SP.A.2

A school secretary plans to order 510 sandwiches for a school picnic. He asks 85 randomly selected students which type of sandwich is their favorite. Based on the data from the sample, how many egg salad should the secretary order? Show your work.

• 123

• 108

• 228

• 30

Tags

CCSS.7.SP.A.2

A school secretary plans to order 510 sandwiches for a school picnic. He asks 85 randomly selected students which type of sandwich is their favorite. Based on the data from the sample, how many turkey should the secretary order? Show your work.

• 150

• 108

• 228

• 30

Tags

CCSS.7.SP.A.2

A bag contains 60 red or black markers. Each student in Mr. Jones's class selects a random sample of 15 markers from the bag, counts the number of black markers, and returns the sample to the bag. What is a reasonable estimate for the number of black markers in the bag? Show your work.

• 90

• 36

• 25

• 40

Tags

CCSS.7.SP.A.2

Desiree, Marina, and Raúl each survey random samples of 60 students in their school about whether they prefer to listen to music while completing homework. They use the results to infer about what percent of students in the school prefer to listen to music while completing homework. Based on the results of the three surveys, what range of inferences is reasonable? Write your answers in the blanks. From ___% to ___% of the school population prefers to listen to music while completing homework.

Results of the surveys:

Desiree 48

Marina 39

Raul 42

• 35% to 55%

• 65% to 80%

• 75% to 100%

• 10% to 25%

Tags

CCSS.7.SP.A.2