uteta15p2 q109

109The mean of n observations is m. If m² - m + 1 is added to each observation, what will be the value of new mean?

Option : D
Explanation : The mean of n observation is m.
if m² - m + 1 is added to cach observation, then the mean will increase by m² - m + 1,
Then new mean = m + m² - m + 1
= (1 + m²)

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