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Section 7.3 (p. 259)

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Vocabulary List the 3 measures of Central Tendency List the 3 measures of Central Tendency A) Mean ( ): _________________________ B) Median: ____________________________ C) Mode: _____________________________

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Vocabulary 1) Statistics: ____________________ ____________________________ ____________________________ 2) Measure of Dispersion: _________ ____________________________ ____________________________ 3) Range: ______________________

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Vocabulary 4) Standard Deviation : _______ : _______ : ________________________ : ________________________ n : ___________ n : ___________

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EXAMPLE 1 Find measures of central tendency TEST SCORES TEST SCORES: 42, 72, 81, 95, 98, 58, 77, 75, 52 83, 97, 45, 89, 93, 57, 82, 97, 75 Mean: ________ Median: ________ Mode: ________ 42, 45, 52, 57, 58, 72, 75, 75, 77, 81, 82, 83, 89, 93, 95, 97, 97, 98

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EXAMPLE 2 Find Range TEST SCORES TEST SCORES: 88, 25, 78, 95, 67, 54 Range: ________

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EXAMPLE 2 Find Standard Deviation TEST SCORES TEST SCORES: 88, 25, 78, 95, 67, 54 ( 25 – 68) 2 = 1849 ( 54 – 68) 2 = 196 ( 67 – 68) 2 = 1 ( 78 – 68) 2 = 100 ( 88 – 68) 2 = 400 ( 95 – 68) 2 = 729 Standard Deviation: ________

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Writing Data Sets as a LIST OF VALUES The data set gives the scores for the University of Georgia football team over a 12 game season. 49 21 2810724 21 12 17354214

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Writing Data Sets as a FREQUENCY TABLE = frequency 23 32 45 51

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FINDING STANDARD DEVIATION W/ CALCULATORS GRAPHING STAT 1) EDIT ENTER #s in L 1 STAT Rt Arrow – CALC 1)1-VAR STAT 2)ENTER…ENTER

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FINDING STANDARD DEVIATION W/ CALCULATORS YELLOWBLUE data2 nd DATA (STAT) ENTER #s in L 1 - 1-VAR 2 nd data (stat) DATA Hit ENTER 4 times- Enter #s (use arrow) - 1-Var Stats- FRQ = 1 (frequency) - DATA – L1STATVAR - FRQ – ONE- use arrow key to scroll - CALC

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