An aging neuroscientist develops a new tool to improve memory function in older adults with mild cognitive impairment (MCI).
Twenty-eight older adults with MCI were equally divided into two samples. The memory function was assessed using a MoCA test where higher scores suggest better cognitive function. The MoCA test was administered before and after several days of exposure to the new tool. A specific hypothesis test was used, and a test statistic of 2.051 was found. Which of the following is correct? Use a two-tailed test and alpha = 0.05.
a) MoCA score is the dependent variable, and based on the information provided, we fail to reject the null hypothesis.
b) The new tool is the dependent variable, and based on the information provided, we fail to reject the null hypothesis.
c) MoCA score is the dependent variable, and based on the information provided, we reject the null hypothesis.
d) The aging neuroscientist is the dependent variable, and based on the information provided, we fail to reject the null hypothesis.