Suppose that it is believed that investor returns on equity investments at a particular brokerage house are normally distributed with a mean of 9 percent and a standard deviation equal to 3.2 percent. What percent of investors at this brokerage house earned at least 5 percent?
A. 89.44 percent
B. 10.56 percent
C. 39.44 percent
D. 100 percent
Answer:A
Suppose that it is believed that investor returns on equity investments at a particular brokerage house are normally distributed with a mean of 9 percent and a standard deviation equal to 3.2 percent. What percent of investors at this brokerage house earned at least 5 percent?
A. 89.44 percent B. 10.56 percent C. 39.44 percent D. 100 percent