Question

HELP PLEASE

Select the correct answer.
Twenty students in Class A and 20 students in Class B were asked how many hours they took to prepare for an exam. The data sets represent
their answers.
Class A: (2, 5, 7, 6, 4, 3, 8, 7, 4, 5, 7, 6, 3, 5, 4, 2, 4, 6, 3, 5)
Class B: (3, 7, 6, 4, 3, 2, 4, 5, 6, 7, 2, 2, 2, 3, 4, 5, 2, 2, 5, 6)

Answer 1

The answer is B

Explanation:

edmentum

Answer 2

B

Explanation:

Class A: (2, 5, 7, 6, 4, 3, 8, 7, 4, 5, 7, 6, 3, 5, 4, 2, 4, 6, 3, 5)

Mean = (2 + 5 + 7 + 6 + 4 + 3 + 8 + 7 + 4 + 5 + 7 + 6 + 3 + 5 + 4 + 2 + 4 + 6 + 3 + 5)/20 = 4.8

Median: 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 7, 7, 7, 8

The two middle numbers are 5 and 5.

median = (5 + 5)/2 = 5

range = 8 - 2 = 6

Class B: (3, 7, 6, 4, 3, 2, 4, 5, 6, 7, 2, 2, 2, 3, 4, 5, 2, 2, 5, 6)

Mean = (3 + 7 + 6 + 4 + 3 + 2 + 4 + 5 + 6 + 7 + 2 + 2 + 2 + 3 + 4 + 5 + 2 + 2 + 5 + 6)/20 = 4

Median: 2, 2, 2, 2, 2, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 5, 6, 6, 7, 7

The two middle numbers are 4 and 4.

median = (4 + 4)/2 = 4

range = 6 - 3 = 3

Summary:

Class A: mean = 4.8; median = 5

Class B: mean = 4; median = 4

B is true.