S2_Level_F_Ch17_Statistics

S2_Level_F_Ch17_Statistics - Statistics Mean Median Mode...

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13 Feb 2012 13 Feb 2012 Created by Mr. Lafferty Maths Dept. Created by Mr. Lafferty Maths Dept. Mean, Median, Mode and Range of Data Set Class Intervals Frequency Tables Statistics Statistics www.mathsrevision.com Mean from a Frequency Table Cumulative Frequency Tables and Median Stem and Leaf Diagrams Pie-Chart Scatter Graphs Probability
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13 Feb 2012 13 Feb 2012 Created by Mr. Lafferty Maths Dept. Created by Mr. Lafferty Maths Dept. Starter Questions Starter Questions www.mathsrevision.com 2 .   S im plif y t h e  r at io  7 : 5 6 2 1. A video has be reduced in the sale by 10%. I t was £ 240. How much is it now. 3. 3.5% of 600p 4. Tidy up the expression 5w + 3y + 4w + 10w 5. Find the area and perimeter of the shape. 8cm 5cm 2cm 4cm
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13 Feb 2012 13 Feb 2012 Created by Mr. Lafferty Maths Dept. Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Learning Intention Learning Intention Success Criteria Success Criteria 2. 2. Work out values of Mean, Median,  Work out values of Mean, Median,  Mode and Range. Mode and Range. 1. To define the terms Mean Median,  Mode and Range for a set of data. 1. 1. Know the terms Mean, Median, Mode  Know the terms Mean, Median, Mode  and Range. and Range. Different Averages
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13 Feb 2012 13 Feb 2012 Created by Mr. Lafferty Maths Dept. Created by Mr. Lafferty Maths Dept. www.mathsrevision.com 1 +1 +1 +1 +2 +3 +2 6 T h e  Me an =  =5 7 Find the mean of the set of data  1, 1, 1, 1, 2, 3, 26   S um of  all t h e  d at a value s  h ow m any d at a value s Can you see that this is not the most suitable of averages since five out of the six numbers are all below the mean of 5 Different Averages
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13 Feb 2012 13 Feb 2012 Created by Mr. Lafferty Maths Dept. Created by Mr. Lafferty Maths Dept. www.mathsrevision.com An average should indicate a  “measure of central tendency”  but should also indicate  what the distribution of data looks like. This is why we have 3 different types of averages to consider 1. The Mean 2. The Median (put the data in order then find the MIDDLE value) 3. The Mode (the number that appears the most) For the above data the Median or Mode is a better average = 1 Different Averages
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13 Feb 2012 13 Feb 2012 Created by Mr. Lafferty Maths Dept. Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Different Averages Example : Find the mean, median, mode and range for the set of data. Range = Highest number – Lowest Number 10, 2, 14, 1, 14, 7 4 8 Me an = = 8 6 Me d ian = 1, 2 , ,1 7 ,10 4 ,14 Mod e = 14 Range = 14 - 1 = 13 7 +10 17 = Me d ian = = 8 .5 2 2
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13 Feb 2012 13 Feb 2012 Created by Mr. Lafferty Maths Dept.
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This note was uploaded on 02/13/2012 for the course MAT 116 A 211 taught by Professor Skinner during the Spring '11 term at University of Phoenix.

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S2_Level_F_Ch17_Statistics - Statistics Mean Median Mode...

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