Question

The first quartile for 21,30,18,24,26,20,21​

Answer 1

Step-by-step explanation:

Given The first quartile for 21,30,18,24,26,20,21

• We need to write the first quartile for the given set of data.
• Writing the data in increasing order will be
•                                          18, 20,21, 21, 24,26, 30
• So the lower half is 18,20,21 and upper half is 24,26,30
• So the median is 21.
• Now from the lower half of the data that is 18,20,21 , the first quartile Q1 will be the median of 18,20,21.
• So the median Q1 = 20
• Therefore the first quartile Q1 = 20

Reference link will be

https://brainly.in/question/6287343