Quartiles | Lower Quartile, Median, and Upper Quartile | Math with Mr. J

What is the primary purpose of quartiles in data analysis?

• To divide a data set into two equal halves.

• To divide a data set into four equal parts.

• To find the average value of a data set.

• To identify the most frequent number in a data set.

What is the essential first step when calculating quartiles for a given data set?

• Calculate the mean of the data.

• Identify the largest number in the data set.

• Arrange the data in ascending order.

• Count the total number of values in the data set.

Which quartile is also known as the median of a data set?

• Q1 (Lower Quartile)

• Q2 (Median)

• Q3 (Upper Quartile)

• Q4 (Highest Quartile)

For the data set 1, 2, 4, 7, 8, 8, 10, 14, 15, what is the Lower Quartile (Q1)?

• 2

• 3

• 4

• 7

What is the first step when finding the lower quartile, median, and upper quartile of a data set?

• Find the average of all numbers.

• Order the data from least to greatest.

• Identify the largest and smallest numbers.

• Divide the data set into two halves.

What is the median (Q2) of the data set: 16, 16, 17, 21, 28, 31, 39, 39?

• 17

• 21

• 24.5

• 28

What is the lower quartile (Q1) of the data set: 16, 16, 17, 21, 28, 31, 39, 39?

• 16

• 16.5

• 17

• 21

What is the upper quartile (Q3) of the data set: 16, 16, 17, 21, 28, 31, 39, 39?

• 28

• 31

• 35

• 39