Question

The data below shows the daily number of cars that passes through a roundabout for some randomly selected days.
43 21 9 33 15 33 49 18 28 46 25
40 32 58 20 25 24 25 62 38 20

1. What is the first quartile?

Answer 1

Answer: The first quartile (Q1) is defined as the middle number between the smallest number and the median of the data set. It is also known as the lower quartile or the 25th empirical quartile and it marks where 25% of the data is below or to the left of it (if data is ordered on a timeline from smallest to largest). The second quartile (Q2) is the median of a data set and 50% of the data lies below this point. The third quartile (Q3) is the middle value between the median and the highest value of the data set. It is also known as the upper quartile or the 75th empirical quartile and 75% of the data lies below this point.

From the given data 43 21 9 33 15 33 49 18 28 46 25 40 32 58 20 25 24 25 62 38 20

First Quartile Q1=20.5

Second Quartile Q2 =28

Third Quartile Q3=41.5

Interquartile Range IQR=21

Median = brainiest