Calculating Variance and Standard Deviation

Calculating Variance and Standard Deviation

Assessment

Interactive Video

Mathematics

9th - 10th Grade

Hard

Created by

Thomas White

FREE Resource

This video tutorial explains how to calculate variance and standard deviation for a discrete data set. It covers the use of Sigma notation, the formula for variance, and the steps to find standard deviation. An example calculation is provided, demonstrating the process using a calculator. The video concludes with a summary of the results and encourages viewers to practice with a given data set.

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28 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main goal of the video?

To introduce probability theory

To discuss the history of statistics

To find the variance and standard deviation for a discrete data set

To explain the concept of mean

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the lowercase Sigma symbol represent?

Standard error

Mean of values

Variance and standard deviation

Sum of values

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is variance calculated according to the video?

Sum of squares divided by the number of values

Mean of the squares minus the square of the mean

Square of the mean minus the mean of the squares

Sum of values divided by the number of values

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the relationship between standard deviation and variance?

Standard deviation is half the variance

Standard deviation is the square of variance

Standard deviation is the square root of variance

Standard deviation is twice the variance

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula for standard deviation?

Half the variance

Twice the variance

Square root of variance

Square of variance

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula for standard deviation?

Square of variance

Square root of variance

Twice the variance

Half the variance

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in solving the example problem?

Calculate the mean of the data set

Calculate the standard deviation

Set up a table and list the numbers

Find the sum of the numbers

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