In Toronto, Canada, 55% of people pass the drivers’ road test. Suppose that every day, 100 people independently take the test.
a. What is the number of people who are expected to pass?
b. What is the standard deviation for the number expected to pass?
c. After a great many days, according to the Empirical Rule, on about 95% of these days, the number of people passing will be as low as _______ and as high as _______.
d. If you found that on one day, 85 out of 100 passed the test, would you consider this to be a very high number?