4. fail to claim a treatment effect when the effect does not exist 3. A normal adult population is known to have a mean µ = 65 on the WPA cognitive ability test. A higher score means better cognitive ability. A researcher studied the detrimental effects of chemotherapy on brain function, so she randomly selected a group of 16 patients who received chemo last month to measure their WPA score. What is the alternative hypothesis for this study?

1. H1

: µ ≥ 65 2. H1

: µ ≤ 65 3. H1

: µ > 65 4. H1

: µ < 65