The formula for total variance (SST) is

Show that E[Sample Variance] = Population Variance

Express variance of a variable X in terms of conditional variances.

Which one is correct?

Lambda can be used for any size table and measures the variance explained but not the direction. True False

How did you get the variance for this problem ?

Construct a numerical example, i.e., a data set, such that a two-sample t-test will yield an insignificant test result but a pair t-test will yield a significant test result. (For the two-sample t-test, you can either assume equal variances or unequal variances, which will not affect the key idea of this question.) I need to know how this is possible and what the basics of making this data set should be.

How do I get the variance ?

How many F ratios are figured in a two-way analysis of variance?     1     2     3     as many as there are cells in the design

We are interested in determining whether or not the variances of the sales at two music stores (A and B) are equal. A sample of 16 days of sales at store A has a sample variance of 20 while a sample of 26 days of sales from store B has a sample variance of 30. The test statistic is (A) 1.50 (B) 1.69 (C) 2.25 (D) 2.50