a-company-tests-a-productivity-tool-on-99-employees-by-recording-their-productiv

Question

A company tests a productivity tool on $9$ employees by recording their productivity (in tasks/hour) before and after using the tool. Using the sign test, they obtain a test statistic of $1$ based on $9$ non-zero differences. At the $0.05$ significance level, the critical value is $2$ . Should the company reject the null hypothesis? What can be concluded about the tool’s effectiveness?

Accepted Answer

Reject the null hypothesis; there is significant evidence that the tool improves productivity.

Answer

Do not reject the null hypothesis; the tool significantly improves productivity.

Answer

Reject the null hypothesis; the tool significantly reduces productivity.

Answer

Do not reject the null hypothesis; there is insufficient evidence that the tool affects productivity.