The Syrian hamster has an average life span of two to three years. Although uncommon, these hamsters can sometimes live up to five years. A hamster's life span can be extended to a degree by providing it with a clean environment and fresh food daily. Continue Reading.
and substituting the estimate for gives. which is an unbiased estimator of the variance of the mean in terms of the observed sample variance and known quantities. Note that, if the autocorrelations are identically zero, this expression reduces to the well-known result for the variance of the mean for independent data.
For the disk I/O-CPU time data of Example 14.1: ! The regression explains 97% of CPU time's variation. 14-20Washington University in St. Louis CSE567M Â©2008 Raj Jain Standard Deviation of Errors ! Since errors are obtained after calculating two regression parameters from the data, errors have n-2 degrees of freedom ! SSE/ (n-2) is called mean squared errors or (MSE). ! Standard deviation of errors = square root of MSE. ! SSY has n degrees of freedom since it is obtained from n independent observations without estimating any parameters.