If calculations are time-consuming and if a sample size is no more than 5% of the size of the population, the states to treat the selections as being independent (even if the selections are technically dependent). if calculations are time-consuming and if a sample size is no more than 5% of the size of the population, the range rule of thumb states to treat the selections as being independent (even if the selections are technically dependent).

5% Guideline for Cumbersome Calculations.

Explanation:

If the calculations that we have to do are consuming more time than we can allot to it and the sample size is not more than 5% size of the population then the 5% guideline for cumbersome calculations is used.

5% Guideline for Cumbersome Calculations states that if the sample size not more than 5% size of the population then it treats the selections as an independent.

i would say b. research typically uses a variety of sources

answer; lorenz;