Lesson: Standard Deviation of a Data Set Mathematics • 9th Grade

In this lesson, we will learn how to find and interpret the standard deviation from a given data set.

Lesson Plan

Students will be able to

understand what a measure of dispersion means and recall the formula for the standard deviation,
calculate the standard deviation from a list of data,
calculate the standard deviation from a frequency table,
calculate the standard deviation from a grouped frequency table,
use the measure of dispersion to make judgements about data.

Q1:

What is the name of a quantity expressing by how much the members of a group differ from the mean value for the group?

Q2:

If the dispersion of a set of values is equal to zero, then which of the following are true?

Q3:

If for a set of 6 values equals 25, find the standard deviation of the set, and round the result to the nearest thousandth.