Yes; when the variance is one.
yes, it can be smaller, equal or larger to the true value of the population varience.
You cannot prove it because it is not true.The expected value of the sample variance is the population variance but that is not the same as the two measures being the same.
No. Variance is always positive and so the sum of variances must also be positive.
yes
Standard Deviation = (principal value of) the square root of Variance. So SD = 10.
Yes, but negative variance indicates environmental variance (i.e., within-family or within-strain) is unusually high, possibly due to poor experimental design. Narrow sense heritability (h2, not H2) = (phenotypic variance - environmental variance) / phenotypic variance.
what is the value of the smallest division on a ammeter
The difference between the Actual Value & Earned Value is the Project Cost Variance
It is 0.6
A normal distribution can have any value for its mean and any positive value for its variance. A standard normal distribution has mean 0 and variance 1.
what is the value of the smallest division on a ammeter