Question

What are the minimum, first quartile, median, third quartile, and maximum of the data set? 9, 20, 4, 18, 4, 18, 20, 9

A. minimum 4; first quartile 10; median 16.25; third quartile 19.5; maximum 20

B. minimum 4; first quartile 6.5; median 13.5; third quartile 19.5; maximum 20

C. minimum 4; first quartile 6.5; median 13.5; third quartile 19; maximum 20

D. minimum 4; first quartile 5.25; median 16.25; third quartile 19; maximum 20

Answer 1

The median is the element that divides the ordered data set in half.

Answer 2

The ordered data set is:
4, 4, 9, 9 | 18, 18, 20, 20
If have marked with a vertical bar (|) the half of the data set. The median is, then, the arithmetic mean between 9 and 18: (9+18)/2 = 13.5.

Answer 3

so whats the answer

Answer 4

I have to calculate the quartiles now.

Answer 5

The first quartile is 6.5 and the third quartile is 19.

Answer 6

That means C is the answer.