After You Calculate the Sample Size Needed to Estimate a Population

question 38

Short Answer

After you calculate the sample size needed to estimate a population proportion to within 0.05, your statistics lecturer tells you the maximum allowable error must be reduced to just 0.025. If the original calculation led to a sample size of 400, the sample size will now have to be: $\begin{array}{|l|l|}\hline\text { A. } & 800 . \\\hline \text { B. } & 200 . \\\hline \text { C. } & 4000 . \\\hline \text { D. } & 1600 \\\hline\end{array}$

---

Definitions:

Researchers

Individuals who conduct systematic investigations and studies to discover or interpret new knowledge.

Wisconsin Card Sorting Test

A neuropsychological test that measures an individual's ability to display flexible thinking as the sorting rules change.

Brain Lesions

Areas of damage or dysfunction in the brain resulting from injury, disease, or medical intervention.

Performance

The execution of an action or the ability to achieve results in a specified task or activity, often measured against known standards.