SC READY Data Analysis, Statistics & Probability

Question 1

A class recorded the number of books read by each student in a month: 2, 5, 3, 7, 5, 4, 5. What is the mode of this data set?

Accepted Answer

5

Answer

The mode is 5 because it appears three times, more than any other value in the data set.

Question 2

A student scored 72, 85, 90, 68, and 95 on five tests. What is the mean (average) score?

Accepted Answer

82

Answer

Adding the scores gives 410, and dividing by 5 tests gives a mean of 82.

Question 3

A bag contains 4 red marbles, 3 blue marbles, and 3 green marbles. What is the probability of randomly selecting a blue marble?

Accepted Answer

3/10

Answer

There are 3 blue marbles out of 10 total marbles (4+3+3=10), so the probability is 3/10.

Question 4

The daily high temperatures for one week were: 78, 82, 75, 90, 82, 79, 85. What is the range of these temperatures?

Accepted Answer

15

Answer

The range is calculated by subtracting the minimum (75) from the maximum (90): 90 − 75 = 15.

Question 5

A line graph shows a store's sales rising from January through June, then dropping sharply in July. What does this pattern most likely indicate?

Accepted Answer

Sales peaked in June and then declined

Answer

A rise followed by a sharp drop indicates sales reached their highest point in June and decreased in July.

SC READY - South Carolina College and Career Ready Assessments Practice Test