q2 mock test very imp

[Priyanshu Singh]

when we have to find sample variance in solution of the question, we used n-1 meaning 9 as denominator out of 10 values

then while finding mean of value why did we take sum of values/10

why didnt we take n=9 as denominator in mean formula if we have to find sample vairance then shouldn't we also use the formula of sample mean

[Statistics 1 Support 1]

Hello Priyanshu,

No, we will not use (n-1) in the denominator while calculating the sample mean. There is a reason behind using (n-1) in the denominator for the calculation of sample variance that you will come across later in the course.

The screenshot that  you have attached here is from the CT course.

Thanks

Nikita

Statistics course support team