In a rating of the satisfaction with their instructor, 13 students gave the following scores from a scale of 1 to 5;
3, 2, 1, 1, 5, 5, 4, 3, 3, 2, 4, 3, 3

-What is the first quartile?
A)1.2
B)2
C)3
D)4
E)4.8

Question

In a rating of the satisfaction with their instructor, 13 students gave the following scores from a scale of 1 to 5;
3, 2, 1, 1, 5, 5, 4, 3, 3, 2, 4, 3, 3

-What is the first quartile?
A)1.2
B)2
C)3
D)4
E)4.8

Quizplus · Accepted Answer

The first quartile is the median of the lower half of the data set. To find it, we first need to order the data from smallest to largest:

1.2, 2, 3, 4, 4.8

The lower half of the data set is:

1.2, 2

The median of this lower half is (1.2 + 2)/2 = 1.6. Therefore, the first quartile is 1.6, which corresponds to choice B.

In a Rating of the Satisfaction with Their Instructor, 13