Data Analysis Math

What is the interquartile range (IQR)?

• 4

• 64

• 60

• 8

Which of the following best describes the process of finding the range for a set of data?

• ADD the biggest and smallest numbers

• Place the number in order from least to greatest then find the middle.

• Find the difference between the Maximum and the Minimum.

• Find the average.

What is the RANGE of this data?

• 40

• 100

• 60

• 45

What is the MEDIAN of this data?

• 90

• 20

• 80 and 90

• None

What is the mean of these numbers: 4, 8, 12, 16, 20?

The mean of the data set {4, 8, 6, 10, 2} is:

• 5

• 6

• 7

• 8

Imagine Abigail, Benjamin, and Ethan are comparing their scores in a game. They scored {12, 15, 13, 19, 12, 16, 14} respectively in seven rounds. Can you help them find the median score?

• 14

• 15

• 13

• 12

Answer explanation

To find the median, first arrange the data set in ascending order: {12, 12, 13, 14, 15, 16, 19}. Since there are 7 values, the median is the middle value, which is 14.

The median of the data set {12, 5, 7, 19, 12, 20} after arranging in ascending order is:

• 11.5

• 12

• 12.5

• 13

The median of the data set 3, 7, 9, 6, and 12 is:

• 7

• 6

• 9

• 8

What is the median of the data?

• 200

• 100

• 90

• 140