Estimated mean becomes the actual arithmetic mean if _______.
State with reason whether the following statements are True or False:
(i) Sum of square of the deviations of items from their arithmetic mean is the maximum.
(ii) Standard Deviation is based on all values.
(iii) For a given set of observations, standard deviation is always more than mean deviation from mean.
A dichromatic light of wavelength 5600 ∘A and 6300 ∘A pass through a prism of crown glass.Then: