Question

12 individuals are chosen at random from a normal derivative and breadth are found to be in meters 54,56,60,44,40,41,36,49,67,69,72,74, in the light of these data discuss suggestion that mean width in the population is 72 meter

Answer 1

The given data is:

54, 56, 60, 44, 40, 41, 36, 49, 67, 69, 72, 74

Mean = (Sum of all observations) / (Total no. of observations)

= $\frac{54+56+60+44+40+41+36+49+67+69+72+74}{12}$

= $\frac{662}{12}$

= 55.167

Hence, the given discussion is wrong. The mean will be 55.167 rather than 72.