Question

find the mean of 40.5, 43.2, 44.1, 42.8,45 ,46.2 ,43.8

Answer 1

Mean
$= \frac{sum \: of \: all \: observations}{total \: no.of \: observations} \\ = \frac{40.5 + 43.2 + 44.1 + 42.8 + 45.0 + 46.2 + 43.8}{7} \\ = \frac{305.6}{7} \\ = 43.6571428571.$




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Answer 2

Mean= sum of all ovservation ÷ Total number of observation

40.5+43.2+44.1+42.8+45+46.2+43.8
------------------------------------------------------
7
=43.657.....