In calculating pooled variance, why are adjustments made for sample size?
A) to remove the effects of sample size
B) because estimates from smaller samples tend to be less accurate than those from larger samples
C) to convert variance to standard deviations
D) to test for Type I and Type II errors

Question

Quizplus · Accepted Answer

Adjustments are made for sample size in calculating pooled variance because estimates from smaller samples tend to be less accurate than those from larger samples. Accounting for sample size helps to minimize the impact of this potential source of bias in the calculation of the pooled variance.

In Calculating Pooled Variance, Why Are Adjustments Made for Sample