Lecture for Physics and EEE

Lecture 001   Topics Covered: General Assumption, Ideal Gas Laws, Relation between Pressure, Volume and RMS Velocity with constant mass and Gas Molecules.                                             Click for Details

Standard Deviation and Variance Deviation just means how far from the normal Standard Deviation The Standard Deviation is a measure of how spread out numbers are. Its symbol is σ (the greek letter sigma) The formula is easy: it is the square root of the Variance. So now you ask, "What is the Variance?" Variance The Variance is defined as: The average of the squared differences from the Mean. To calculate the variance follow these steps: Work out the Mean(the simple average of the numbers) Then for each number: subtract the Mean and then square the result (the squared difference ). Then work out the average of those squared differences. Example You and your friends have just measured the heights of your dogs (in millimeters): The heights (at the shoulders) are: 600mm, 470mm, 170mm, 430mm and 300mm. Find out the Mean, the Variance, and the Standard Deviation. Your first step is to find the Mean: Answer: Mean =   ...

The assignment is done for my loving friends, best wishers and all of the AUST students: Practice Exercise 13.1: Practice Exercise 13.2: Practice Exercise 13.3:   Problem 13.1: Problem 13.2 Problem 13.3 with the best wishes By_ Md. Monzurul Islam ( Raton) web: www.monzu.webs.com