Harold holds the annual convention for Mathematics Teachers around the Philippines. During a survey answered by 1 200 teachers, it was found out that the mean satisfactory of teachers to their salaries is 2.15 out of 5 with a standard deviation of 1.4. Harold wanted to know how many teachers gave a rate of at least 3.5 out of 5.
a. What value of 2 is to be used to solve the problem?
b. Represent and compute for the area described in the problem.
c. How many teachers gave a rating of at least 3.5? Show your solutions.
