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A very large data set (N > 10,000) has a mean value of 876.7 units and...

A very large data set (N > 10,000) has a mean value of 876.7 units and a standard deviation of 12.5 units. Determine the range of values in which 70% of the data set should be found assuming normal probability density (find a in the equation xi = x' ± a).

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Soludion Fon Gven doda, P (1x14%): 0.7 12 15 12 orml table) h-876-7 12.5 12.5hence -Hu Yange of Values an ( 634 ,889 구) Hence P(863,7 LX-889구)込0,7(70%) 889.7-863.7 26 2 a 13 0

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