Calculate the simple and weighted arithmetic means

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Reference no: EM131246861

(a) The following table gives the monthly salary of academic staff of a college. Calculate the simple and weighted arithmetic means of their monthly salary. Which of these averages is most appropriate and why?

(b) The sum of deviations of a certain number of observations from 12 is 166 and the sum of deviations of these observations from 16 is 54. Find the number of observations and their mean.

Reference no: EM131246861

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