环境数据分析课件 (4).pdf

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1、Chapter 2 Descriptive StatisticsData and features determine the upper limit of“analysis”learningChapter 2 Descriptive Statistics Frequencies&Histograms Central Tendency Statistical Dispersion Shapes of DistributionMean Median ModeStd Min MaxKurtosis Skewness The locations of wetlands in the world Fr

2、equencies&Histograms Central Tendency Statistical Dispersion Shapes of DistributionChapter 2 Descriptive StatisticsTable x.Frequency table showing a hypothetical distribution of soil health indexSoil health indexFrequency2432352210218205193183170163Table x.Frequency table showing a hypothetical dist

3、ribution of soil health indexSoil health indexFrequency1325324651063738092101.1004Table x.Frequency table showing a hypothetical distribution of soil health indexSoil health indexFrequency24-221821-191618-166Grouped frequency tableGround biomss(g/m2)Frequency24126012212402201220218120091611804141160

4、2Table x.Grouped frequency table showing a hypothetical distribution of ground biomassA grouped frequency table showing numbers of rivers of the water quality indexWater Quality Index FrequencyPercentageI3020.0II6040.0III3020.0IV2013.3V106.7 Frequencies&Histograms Central Tendency Statistical Dispersion Shapes of DistributionChapter 2 Descriptive StatisticsHistogramsKarlKarl PearsonPearsonFigure x.Histogram showing the distribution of soil health index