S3_3_Credit_Ch12_Statistics_MIA

S3_3_Credit_Ch12_Statistics_MIA - S3 Credit Statistics Mean...

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13 Feb 2012 13 Feb 2012 Created by Mr. Lafferty Created by Mr. Lafferty 1 Statistics Statistics Mean Mean from a Frequency Table Range of a Set of Data www.mathsrevision .com Median and Mode Semi-Interquartile Range ( SIQR ) S3  Credit Quartile Graphs ( S – Curves ) Standard Deviation / Sample Standard Deviation Probability Estimating Probability from Relative Frequency
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13 Feb 2012 13 Feb 2012 Created by Mr. Lafferty Created by Mr. Lafferty 2 www.mathsrevision.com Starter Questions Q1. Round to 2 significant figures Q2. Why is  2 + 4  x  2 = 10 and not 12 Q3. Solve for x (a) 52.567 (b) 626 2 20 8 x x + = + S3  Credit
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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 1. Know the term mean. 1.   Explain the meaning of the term  Mean Frequency Tables Frequency Tables  Working Out the Mean 2. 2. Calculate the mean for a given set of  Calculate the mean for a given set of  data. data. S3  Credit
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13 Feb 2012 Created by Mr. Lafferty 4 The mean The   mean   is the most commonly used average . To calculate the mean of a set of values we add together the values and  divide by the total number of values . For example, the mean of 3, 6, 7, 9 and 9 is 3  + 6  + 7  + 9  + 9 5 3 4 5 = 6 .8 = Mean   = Sum of values Number of values
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13 Feb 2012 Created by Mr. Lafferty 5 Two dice were thrown 10 times and their scores were added together and  recorded. Find the   mean   for this data. 7, 5, 2, 7, 6, 12, 10, 4, 8, 9 Mean 7  + 5  + 2  + 7  + 6  + 12  + 10  + 4  + 8  + 9 10 = 7 0 10 = 7 =
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13 Feb 2012 13 Feb 2012 Created by Mr. Lafferty Created by Mr. Lafferty 6 Now try Exercise 2.1 Ch12  (page 228) www.mathsrevision.com Average / Mean Average / Mean S3  Credit
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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 9 36 9( - 2)( 2) x x x - + 1. Mutliply out 2y( y - 4) 3. 12% of £ 22 4. Tidy up the expression 7 - (- 10) 3 2 .   Ex plain why  f ac t or is e s t o  S3  Credit
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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 1. 1. Add a third column to a frequency  Add a third column to a frequency  table. table. 1.   To explain how to work out the  Mean  by adding in a third column  to a Frequency Table. Frequency Tables Frequency Tables  Working Out the Mean 2. 2. Calculate the Mean from a frequency  Calculate the Mean from a frequency  Table.
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S3_3_Credit_Ch12_Statistics_MIA - S3 Credit Statistics Mean...

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