College Study Series 099 Stevens Henager College Math Studies Lesson 3 College Study Series 099 Stevens Henager College

Averages Review This lesson will be a review of the basic procedure of finding averages This lesson will clarify concepts you may not have understood completely

Averages Everywhere A + $$ Averages are used everyday Grades Weather Temperature Rainfall Sales Population $$

Average Definition Division Addition & An average can be obtained by dividing the sum of two or more quantities by the number of quantities. Division Addition &

Finding the Average An average can be found for a set or group of numbers. Example: Monday Tuesday Wednesday Thursday Friday 28miles 34 miles 29 miles 39 miles 35 miles What is the average miles driven a day this week?

Finding Average . . . Step 1 Add all numbers together to get a sum. 28miles+34 miles+29 miles+39 miles+35 miles = 165 miles Step 2 Divide the sum by the number of quantities added together 165 miles -:- 5(days) = 33 miles/day Average

Review Steps To find an average of a group of numbers: Lets say these are grades for a class. 85, 72, 84, 75, 84, 80 1st add all numbers together 85 + 72 + 84 + 75 + 84 + 80 = 480 1 2 3 4 5 6 2nd Divide the sum by the quantity of numbers 480 -:- 6 = 80 Average

Writing Averages Averages are often written as whole numbers A football player catches the following number of passes during 8 games 6 8 5 9 4 7 6 7 1st Add: 6 + 8 + 5 + 9 + 3 + 7 + 6 + 7 = 52 2nd Divide:52 -:- 8 = 6.5 round to a whole number Average = 7 carries a game

Average = Mean Many times in research you will hear the term the “mean” A mean is just another word for average

References http://www.freefoto.com/images/29/09/29_09_14---Ferrari-sports-cars_web.jpg 1/19/10 http://www.football-clip-art.com/football_clip_art.jpg 1/19/10 http://www.sptimes.com/News/053101/photos/grad-hernando.jpg 1/19/10 A.V. Treff, D. H. Jacobs.(2003).Basic Math Skills. AGS Publishing; Circle Pines, MN. http://www.yav.com/yav/images/SpkTu25.gif 1/19/10