Variance and Standard Deviation

Views:
 
Category: Education
     
 

Presentation Description

This is part of the course on managerial statistics that is available without passwords at http://openonlinecourses.com/statistics This video has been organized by Farrokh Alemi, Ph.D. The presentation is narrated by Yara Alemi.

Comments

Presentation Transcript

Variance & Standard Deviation:

Variance & Standard Deviation By Farrokh Alemi, Ph.D.

Variance:

Variance

Deviation:

Deviation

Deviation:

Deviation Mean Observation Distance

Deviation:

Deviation Mean Observation More than Mean Mean Observation Less than Mean

Variance:

Variance

Standard Deviation:

Standard Deviation

Standard Deviation:

Standard Deviation Observations in Population Mean Deviation 5 4 1 2 4 -2 5 4 1 Total 0

Standard Deviation:

Standard Deviation Observations in Population Mean Deviation Squared Deviation 5 4 1 1 2 4 -2 4 5 4 1 1 Total 0 6

Standard Deviation:

Standard Deviation Observations in Population Mean Deviation Squared Deviation 5 4 1 1 2 4 -2 4 5 4 1 1 Total 0 6 Number of observations 3 Standard deviation 1.7

Standard Deviation:

Standard Deviation Small standard deviation Large standard deviation

Standard Deviation:

Standard Deviation

Take Home Lesson:

Standard Deviation measures the spread of data around the mean Take Home Lesson

Do One::

Calculate the standard deviation for the following three observations: 3, 4 and 5. Do One:

authorStream Live Help