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Section 1.2

Section 1.2 . Analyzing Data. Let’s first consider individual data such as quiz scores or hourly wages for different jobs, such as this 1992 data of hourly wages. Manufacturing Mining Construction Transportation Whole Trade Retail Trade Finance Service

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Section 1.2

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  1. Section 1.2 Analyzing Data

  2. Let’s first consider individual data such as quiz scores or hourly wages for different jobs, such as this 1992 data of hourly wages. Manufacturing Mining Construction Transportation Whole Trade Retail Trade Finance Service $11 $15 $14 $13 $11 $7 $11 $11 the difference between the max and min The range is ____________________________________ . For the given info., the range is ________. What does the range tell you about the data? 8 How much the data differs. The higher the range, the more it varies average of the data The mean is the _____________________________________________. For the given info the mean is ________. In what instance might the mean not be an accurate describer of a data set? 11.63 When there is an EXTREME outlier The median of a set of data is _______________________________. If a data set has an even number of values, the median is ___________________________. For the given data, the median is ________. middle # average of the 2 middle #’s 11 Remember, they must be in order first before you can find the median

  3. Hint for calc: • Push Stat / Push Edit / Push L1 (2nd number 1) / Quit (2nd Mode) • Push Stat / over to Calc / Push 1-Var Stats / List (2nd Stat) / L1 (2nd number 1) / Push Enter • To clear the data in L1 • Push Stat / Push ClrList / Push L1 (2nd number 1)

  4. The study of related data is a little more complex and will continue throughout the year. For now, our concern is the geometric shape of the data. The following table shows the % of the GNP spent on health care. In this example, the years represent the ____________ of the relationship and the percentages the ____________. domain (x’s) range (y’s) 1990 1985 1980 1965 1960 1970 1975

  5. Possible geometrical representations (it will never be perfect). LINEAR QUADRATIC EXPONENTIAL Page 28: 1-11 Only find the Mean, Median, Mode and Range for problems 7-10

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