Numerical summary of data Covariance and Correlation Numerical Summary of Data Pan Chao November 17, 2014 Numerical summary of data Covariance and Correlation Measures of center Measures of Center 1. Mean: arithmetic average x1 + x2 + . . . + xn 1∑ = xi n n n x ¯= i=1 Example: 1, 2, 2, 3, 4, 7, 9 x ¯= 1+2+2+3+4+7+9 = 4. 7 Numerical summary of data Covariance and Correlation Measures of center 2. Mode: most frequent value in a data set, highest peak. Example: 2 is the mode in the…
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