SAT Problem Solving & Data Analysis 5

Question 1

A survey samples 50 students from a school of 1,000. To make valid conclusions about all students, the sample should be:

Accepted Answer

Randomly selected

Answer

A random sample reduces bias and allows generalization to the whole population.

Question 2

A spinner has 8 equal sections, 3 of which are red. What is the probability of landing on red?

Accepted Answer

3/8

Answer

Probability = favorable ÷ total = 3 ÷ 8.

Question 3

In a two-way table, 40 of 100 surveyed adults prefer tea. What percent prefer tea?

Accepted Answer

40%

Answer

40 out of 100 is 40/100 = 40%.

Question 4

A box has 5 red and 3 blue marbles. What is the probability of drawing a blue marble?

Accepted Answer

3/8

Answer

There are 3 blue out of 8 total marbles, so probability is 3/8.

Question 5

A study with a small margin of error generally indicates:

Accepted Answer

A more precise estimate

Answer

A smaller margin of error means the estimate is more precise.

SAT Practice Test