I'm asking for problem number 9. I'm confused on the formula to use and how to determine if I use the body or tail column to compute the Z score.

the adult population who scored better than Henry on this object naming test. Assume that the population of object naming scores on this test is normally distributed. 9. Finally, Henry performed the Stroop test. He was told to name the color of ink that a list of color names (e.g., blue, red, orange) were printed in. Each color name was printed in an ink color that was different from the color name (e.g., blue might be printed with black ink). The time it took Henry to name the ink color of all the words was recorded. For this test, faster times indicate better performance. It took him 15.70 seconds to complete the task. In the adult population, the parameters were u = 16.20 seconds and o = 1.30 seconds. Use a z score to determine the proportion of people in the adult population who scored better than Henry on this test. Assume that the population of Stroop test times is normally distributed. 10. Now, Dr. Gatz needs your help to interpret the three z scores that you computed. Based on Henry's z scores of the memory test, the object naming test, and the Stroop test, do you think Dr. Gatz should focus his future investigations on Henry's memory systems, naming systems, or attentional systems (i.e., those assessed by the Stroop test)? Explain your reasoning to Dr. Gatz