When we talk about standard deviation of a complete population we use sigma n, but when we take out sample from that population and try to estimate the standard deviation we calculate sigma(n-1). In this scenario we are taking sample of rainfall data, Hence, sigma(n-1) will be applicable.
Thank you so much sir....
Sir When will we use sigma n and sigma(n-1)?
When we talk about standard deviation of a complete population we use sigma n, but when we take out sample from that population and try to estimate the standard deviation we calculate sigma(n-1). In this scenario we are taking sample of rainfall data, Hence, sigma(n-1) will be applicable.