Question

The data represent the ages of people working at a store.

20, 30, 22, 29, 24, 27, 33, 25, 21, 19, 23

What is the first quartile of these ages?

A.
19

B.
20

C.
21

D.
29

Answer 1

19,20,21,22,23,24,25,27,29,30,33

Q2 (median ) is 24
Q1 = 21
Q3 = 29

first quartile is the median of all the numbers before Q2 (quartile 2)....and that is C. 21

Answer 2

hmm. at first we need to arrange this set in ascending order.
19 20 21 22 23 24 25 27 29 30 33
next we find a median. middle value.
24.
The first quartile (Q1) is defined as the middle number between the smallest number and the median of the data set.
so Q1 is 21

Answer 3

Thanks everyone!

Answer 4

great minds think alike :)