Suppose a researcher is interested in the effectiveness of a new study drug at increasing performance on a memory recall test in children with advanced attention deficit and hyperactivity disorder (ADHD). To test the hypothesis, the researcher has each participant take the memory recall test with no study drug, and then again after the study drug has been introduced. Assume the following table represents scores on both examinations for a SRS of participants, and that they can be treated as a normal distribution. Upon analyses the research reports a Z-statistic of -5.036 at a p-value of < .001.

Participant	Memory Recall Performance (%) Without study drug	Memory Recall Performance (%) With study drug
A	72	84
B	74	87
C	87	94
D	92	93
E	73	79
F	68	83
G	69	82

A. Write out the null and alternative hypotheses using an =0.05. B. Correctly interpret the results based on the other statistical output listed above.