BSEP Statistics, Central Tendency, and Basic Probability

Question 1

What is the mean (average) of the numbers 6, 10, 14, and 18?

Accepted Answer

12

Answer

Add all values: 6 + 10 + 14 + 18 = 48. Divide by the count of values: 48 ÷ 4 = 12.

Question 2

What is the median of the data set: 3, 7, 9, 15, 20?

Accepted Answer

9

Answer

The median is the middle value when data is arranged in order. With 5 values, the middle (3rd) value is 9.

Question 3

In the set {2, 4, 4, 6, 8, 4}, what is the mode?

Accepted Answer

4

Answer

The mode is the value that appears most often. The number 4 appears three times, more than any other value.

Question 4

What is the range of the data set: 12, 5, 9, 18, 3?

Accepted Answer

15

Answer

Range = maximum value − minimum value. Maximum is 18, minimum is 3: 18 − 3 = 15.

Question 5

A bag contains 4 red marbles and 6 blue marbles. If one marble is chosen at random, what is the probability it is red?

Accepted Answer

2/5

Answer

Total marbles = 4 + 6 = 10. Probability of red = favorable outcomes ÷ total outcomes = 4/10 = 2/5.

BSEP - Basic Skills Education Program Practice Test