Posted by **Lila** on Monday, October 11, 2010 at 8:47pm.

Hi,

My professor gave us the formulas for sample variance and population variance, as well as the shortcut formulas for each.

However, he said that on some of the problems, we will HAVE to use the long formula, which for population variance would be: E(x-mean)^2/N

Can someone give me an example of a problem in which I would be unable to use the shortcut formulas so that I will know when it's not appropriate to use it?

## Answer this Question

## Related Questions

- elementary statistics - A statistics professor is used to having a variance in ...
- elementary statistics - A statistics professor is used to having a variance in ...
- Statistics - The grades in the final exam of a random sample of 25 students ...
- statistics - A psychologist wants to estimate the variance of employee test ...
- Statistics - 1.A sample of 25 bottles is taken from the production line at a ...
- Statistics - Exam Grades. A statistics professor is used to having a variance in...
- statistics - Consider a study in which the population variance estimate based on...
- Statistics - Consider a study in which the population variance estimate based on...
- statistics - Suppose we take a random sample of size n from a normal population ...
- Statistics - Which of these statements is not true about the variance in a ...