Question

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

17, 25, 18, 24, 18, 22, 30, 21, 18, 17, 19

What is the first quartile of these ages?

A.
18

B.
24

C.
21

D.
19

Answer 1

What do you get when you sort the numbers?

Answer 2

sort them? from like least to greatest?

Answer 3

yes

Answer 4

okay let me see

Answer 5

17,17,18,18,18,19,21,22,24,25,30

Answer 6

what is the median of that data set?

Answer 7

19?

Answer 8

the lower half (below the median) is this data set: 17,17,18,18,18

what is the median of that lower half?

Answer 9

18

Answer 10

that's Q1

Answer 11

Q1 is the median of the lower half
Q3 is the median of the upper half

Answer 12

Thank you!

Answer 13

you're welcome