A researcher decided to study the effect of a drug (MAO inhibitor) on the number of nightmares occurring in veterans with post-traumatic stress disorder (PTSD). The drug company claims that it is effective in decreasing the number of nightmares, but did not publish any testing result. To bridge this gap, the researcher recruited a sample of PTSD clients and asked them to record each incident of a nightmare for one month before treatment. Subjects were then given the medication for one month, and they continued to report each occurrence of a nightmare. For the set of hypothetical data (second sheet on this Excel), determine if the MAO inhibitor is effective in reducing nightmares. Use the 0.05 level of significance. State the conclusion below and upload your final Excel file after providing your answer here.

Number of Nightmares One Month Before Treatment One Month During Treatment 1 10 UNNUOW