Ch 14 Notes

# Ch 14 Notes - Chapter 14 Summarizing Data In which graph is...

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Summarizing Data Chapter 14

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52,000 54,000 56,000 58,000 60,000 62,000 64,000 66,000 Profit 1 2 3 4 5 6 Years in Business Annual Profits of MyCo 0 10,000 20,000 30,000 40,000 50,000 60,000 70,000 Profit 1 2 3 4 5 6 Years in Business Annual Profits of MyCo In which graph is MyCo profiting more? Years in Business 1 2 3 4 5 6 Profits 53,000 56,000 58,000 62,000 65,000 66,000
Measures of Location : the mean (average), the median, & the quartiles Measures of Spread : the range, the interquartile range, & the standard deviation MEAN (average) The average of a set of N numbers is found by adding the numbers and dividing the total by N x x x x N N 1 2 3 + + + + . . . Mean =

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Example: Pedro Martinez recorded the following number of strikeouts over the course of 23 games. On average, how many strikeouts did he record each game? 6, 3, 8, 11, 5, 9, 10, 10, 8, 10, 8, 6, 3, 5, 8, 1, 2, 0, 4, 1, 1, 1, 2 6 3 8 1 1 5 9 1 0 1 0 8 1 0 8 6 3 5 8 1 2 0 4 1 1 1 2 2 3 + + + + + + + + + + + + + + + + + + + + + + 1 3 7 2 3 5.9565 Pedro recorded an average of about 6 strikeouts per game.
The average daily temperature for the month of August in both Phoenix, AZ and Miami, FL was 86°. Why does using only the mean not tell the whole story? The high and low temperatures were probably quite different. Phoenix High 102 Low 70 Miami High 90 Low 82 Range: highest - lowest Phoenix Range: 32 Miami Range: 8

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A survey of 50 people who graduated in 1998 with a degree in speech communication found that
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## This note was uploaded on 05/06/2008 for the course MATH 110 taught by Professor Pietro during the Spring '08 term at SUNY Fredonia.

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Ch 14 Notes - Chapter 14 Summarizing Data In which graph is...

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