中位数数学meanmedianmode.ppt

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1、Mean,Median,Mode&Range,By Monica Yuskaitis,Copyright 2000 by Monica Yuskaitis,Vocabulary Review,Sum the answer to an addition problem.Addend the numbers you added together to get the sum.,6+9=15,Copyright 2000 by Monica Yuskaitis,Definition,MeanMeansAverage,Copyright 2000 by Monica Yuskaitis,Definit

2、ion,Mean the average of a group of numbers.,2,5,2,1,5,Mean=3,Copyright 2000 by Monica Yuskaitis,Mean is found by evening out the numbers,2,5,2,1,5,Copyright 2000 by Monica Yuskaitis,Mean is found by evening out the numbers,2,5,2,1,5,Copyright 2000 by Monica Yuskaitis,Mean is found by evening out the

3、 numbers,2,5,2,1,5,mean=3,Copyright 2000 by Monica Yuskaitis,How to Find the Mean of a Group of Numbers,Step 1 Add all the numbers.,8,10,12,18,22,26,8+10+12+18+22+26=96,Copyright 2000 by Monica Yuskaitis,How to Find the Mean of a Group of Numbers,Step 2 Divide the sum by the number of addends.,8,10,

4、12,18,22,26,8+10+12+18+22+26=96,How many addends are there?,Copyright 2000 by Monica Yuskaitis,How to Find the Mean of a Group of Numbers,Step 2 Divide the sum by the number of addends.,6),96,sum,#of addends,1,6,3,6,6,6,3,Copyright 2000 by Monica Yuskaitis,How to Find the Mean of a Group of Numbers,

5、The mean or average of these numbers is 16.,8,10,12,18,22,26,Copyright 2000 by Monica Yuskaitis,What is the mean of these numbers?,7,10,16,11,Copyright 2000 by Monica Yuskaitis,What is the mean of these numbers?,2,9,14,27,13,Copyright 2000 by Monica Yuskaitis,What is the mean of these numbers?,1,2,7

6、,11,19,8,Copyright 2000 by Monica Yuskaitis,What is the mean of these numbers?,26,33,41,52,38,Copyright 2000 by Monica Yuskaitis,Definition,Medianis in theMiddle,Copyright 2000 by Monica Yuskaitis,Definition,Median the middle number in a set of ordered numbers.,1,3,7,10,13,Median=7,Copyright 2000 by

7、 Monica Yuskaitis,How to Find the Median in a Group of Numbers,Step 1 Arrange the numbers in order from least to greatest.,21,18,24,19,27,18,19,21,24,27,Copyright 2000 by Monica Yuskaitis,How to Find the Median in a Group of Numbers,Step 2 Find the middle number.,21,18,24,19,27,18,19,21,24,27,Copyri

8、ght 2000 by Monica Yuskaitis,How to Find the Median in a Group of Numbers,Step 2 Find the middle number.,18,19,21,24,27,This is your median number.,Copyright 2000 by Monica Yuskaitis,How to Find the Median in a Group of Numbers,Step 3 If there are two middle numbers,find the mean of these two number

9、s.,18,19,21,25,27,28,Copyright 2000 by Monica Yuskaitis,How to Find the Median in a Group of Numbers,Step 3 If there are two middle numbers,find the mean of these two numbers.,21+25=,46,2),46,23,median,Copyright 2000 by Monica Yuskaitis,What is the median of these numbers?,16,10,7,10,7,10,16,Copyrig

10、ht 2000 by Monica Yuskaitis,What is the median of these numbers?,29,8,4,11,19,11,4,8,11,19,29,Copyright 2000 by Monica Yuskaitis,What is the median of these numbers?,31,7,2,12,14,19,13,2,7,12,14,19,31,12+14=26,2),26,Copyright 2000 by Monica Yuskaitis,What is the median of these numbers?,53,5,81,67,2

11、5,78,60,53+67=120,2),120,5,25,53,67,78,81,Copyright 2000 by Monica Yuskaitis,Definition,Modeis the mostPopular,Copyright 2000 by Monica Yuskaitis,Definition,A la mode the most popular or that which is in fashion.,Baseball caps are a la mode today.,Copyright 2000 by Monica Yuskaitis,Definition,Mode t

12、he number that appears most frequently in a set of numbers.,1,1,3,7,10,13,Mode=1,Copyright 2000 by Monica Yuskaitis,How to Find the Mode in a Group of Numbers,Step 1 Arrange the numbers in order from least to greatest.,21,18,24,19,18,18,18,19,21,24,Copyright 2000 by Monica Yuskaitis,How to Find the

13、Mode in a Group of Numbers,Step 2 Find the number that is repeated the most.,21,18,24,19,18,18,18,19,21,24,Copyright 2000 by Monica Yuskaitis,Which number is the mode?,29,8,4,8,19,8,4,8,8,19,29,Copyright 2000 by Monica Yuskaitis,Which number is the mode?,1,2,2,9,9,4,9,10,9,1,2,2,4,9,9,9,10,Copyright

14、 2000 by Monica Yuskaitis,Which number is the mode?,22,21,27,31,21,32,21,21,21,22,27,31,32,Copyright 2000 by Monica Yuskaitis,Definition,Rangeis the distanceBetween,Copyright 2000 by Monica Yuskaitis,Definition,Range the difference between the greatest and the least value in a set of numbers.,1,1,3,

15、7,10,13,Range=12,Copyright 2000 by Monica Yuskaitis,How to Find the Range in a Group of Numbers,Step 1 Arrange the numbers in order from least to greatest.,21,18,24,19,27,18,19,21,24,27,Copyright 2000 by Monica Yuskaitis,How to Find the Range in a Group of Numbers,Step 2 Find the lowest and highest

16、numbers.,21,18,24,19,27,18,19,21,24,27,Copyright 2000 by Monica Yuskaitis,How to Find the Range in a Group of Numbers,Step 3 Find the difference between these 2 numbers.,18,19,21,24,27,27 18=9,The range is 9,Copyright 2000 by Monica Yuskaitis,What is the range?,29,8,4,8,19,29 4=25,4,8,8,19,29,Copyri

17、ght 2000 by Monica Yuskaitis,What is the range?,22,21,27,31,21,32,32 21=11,21,21,22,27,31,32,Copyright 2000 by Monica Yuskaitis,What is the range?,31,8,3,11,19,31 3=28,3,8,11,19,31,Copyright 2000 by Monica Yuskaitis,What is the range?,23,7,9,41,19,41 7=34,7,9,23,19,41,Copyright 2000 by Monica Yuskaitis,Credits,Clipart from ClickArt 125,000,T/Maker Company of Broderbund Software,Inc.,Copyright 2000 by Monica Yuskaitis,Credits,Clipart from ClickArt 125,000,T/Maker Company of Broderbund Software,Inc.,