Finding the Range of Data

This lesson teaches how to find the range of a data set, both including and excluding outliers, using graphs and charts. It explains the concepts of mean and median, and demonstrates how to calculate the range with examples. The lesson also covers the impact of outliers on the range and how to handle them. Visual aids like dot plots and bar graphs are used to illustrate these concepts.

What is the primary focus of both mean and median in a data set?

• The spread of the data

• The range of the data

• The center of the data

• The outliers in the data

How can the range of a data set be expressed?

• As the difference between the greatest and least numbers

• As the average of all numbers

• As the sum of all numbers

• As the product of the greatest and least numbers

What is the first step in finding the range of a data set?

• Identifying the outliers

• Ordering the numbers from greatest to least

• Finding the median

• Adding all the numbers together

In the example of Jessica's homework grades, what was identified as the outlier?

• 100

• 78

• 22

• 0

How does removing an outlier affect the range of a data set?

• It doubles the range

• It has no effect on the range

• It increases the range

• It decreases the range

What is the range of average test scores in the bar graph example?

• 60

• 90

• 30

• 120

What is the key takeaway from the lesson on finding range?

• Range is always the same regardless of outliers

• Range can be affected by outliers and is found using graphs and charts

• Range is only important in bar graphs

• Range is the same as the median