Question

At music camp, Addison tracked the number of minutes she practiced her trombone each day.

Practice time (min.)
50
70
90
110
130
150
What was the lower quartile of Addison's practice time?
minutes

Answer 1

70

Explanation:

To find the quartiles of a data-set, we must first split the data through the middle.

This puts 50, 70, and 90 on the left.

And 110, 30, and 150 to the right.

The quartiles would be the median of these (3) numbers.

Since we are finding the Lower Quartile, we find the median of

50,70 and 90.

It will be 70.