The test scores of 15 students are listed below.Find the lower quartile (Q1)by hand. 41 49 50 55 58
64 65 68 72 76
85 87 90 94 95
A)55
B)56.5
C)58
D)85
E)86

Question

Quizplus · Accepted Answer

To find the lower quartile (Q1), we need to divide the data set into four quarters.

1. First, arrange the scores in ascending order:

41 49 50 55 58 64 65 68 72 76 85 87 90 94 95

2. Find the median (middle value) of the lower half of the data set:

41 49 50 55 58

The median of this set is 55.

Therefore, the lower quartile (Q1) is 55 (Choice A).

The Test Scores of 15 Students Are Listed Below