Question

Mary drew a box and whisker plot for the following data: 23, 10, 12, 30, 26, 8, 25, 18.Find the following: First Quartile: Median: Third Quartile: Range:

Answer 1

1st Qtrl: 11

Median: 20.5

3rd Qtrl: 25.5

Range: 22

Explanation:

Median = average of 2 middle values (18 + 23) / 2

1st Qtrl = average of 10 and 12 (the lower half of data)

3rd Qtrl = average of 25 and 26 (the upper half of data)

Range = largest value - smallest value; 30 - 8 = 22