Question

calculate mean for the following data by shortcut method 70, 65, 5
5, 75, 80, 85, 65, 70, 95​

Answer 1

Answer:

Explanation:

First take an appropriate 'Assumed Mean' A. *calculate the sum of the frequencies, ∑i=1nfi . *calculate ∑i=1nfidi where di=xi−A. *calculate mean as xˉ=A+∑fi∑fidi×h where h = the class width =upperclasslimit−lowerclasslimit of the frequency distribution.