1. Sherlock, John, Molly and Mycroft's score in their Midterm exams are 90, 75, 80, and 95, respectively. Find the z score of John if the mean is 85 and the sd is 5?

2. Using the z-score of John we can conclude that...

a.)34% of the scores including John fall between the mean and 1sd below the mean

b.) 48% of the scores including John fall between the mean and 2sd below the mean

c.) John's score is above average

d.) John's score is average.

3. What can we say about Molly and Mycroft's zscore?

a.) Both Molly and Mycroft scores are on the average.

b.) Molly's score is 1sd above the mean while Mycroft's score is 2sd below the mean.

c.) Both of them failed the test

d.) Mycroft's score lies approximately 48% from the average.