A set of eight systolic blood pressures is given. 1 2 3 4 5 6 7 8 Pressure 113 121 131 154 128 116 103 120 (a) Find values of the mean and standard deviation for these data. (Round your answers to...

(a) Find values of the mean and standard deviation for these data. (Round your answers to three decimal places.)
1.(the mean)
2.(standard deviation)


(b) What is the value of the variance for these data?

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