Question

find the first quartile and third quartile for the set of values.

25, 34, 17, 12, 39, 26, 48, 21, 24

12, 17, 21, 24, 25, 26, 34, 39, 48


first quartile = 22; third quartile = 29.75

O first quartile = 25.5; third quartile = 34.5

first quartile = 18.5; third quartile = 34.25

first quartile = 19; third quartile = 36.5

Answer 1

To find the first quartile (Q1), we need to find the median of the lower half of the data set. For the given data set:

Q1 = (21 + 24) / 2 = 22.5

To find the third quartile (Q3), we need to find the median of the upper half of the data set:

Q3 = (26 + 34) / 2 = 30

Therefore, the first quartile (Q1) is 22.5 and the third quartile (Q3) is 30.