Question

What is the formula for the arithmetic mean?

(a) \(\frac {Number \, of \, the \, observations}{Sum \, of \, observations}\)

(b) \(\frac {Sum \, of \, the \, observations}{Number \, of \, observations}\)

(c) \(\frac {Product \, of \, the  \, observations}{Number \, of \, observations}\)

(d) \(\frac {Sum \, of \, the \, observations}{Product \, of \, the \, observations}\)

This question was addressed to me by my college director while I was bunking the class.

This is a very interesting question from Statistics topic in chapter Statistics of Mathematics – Class 10

Answer 1

The correct choice is (b) \(\frac {Sum \, of \, the \, observations}{Number \, of \, observations}\)

Explanation: Arithmetic mean can also be called the average of given variables in a distribution. The formula for arithmetic mean is the ratio of the sum of the observations to the number of observations.

Arithmetic mean = \(\frac {Sum \, of \, the \, observations}{Number \, of \, observations}\)