In: Statistics and Probability
The Aluminum Association reports that the average American uses
56.8 pounds of aluminum in a year. A random sample of 51 households
is monitored for one year to determine aluminum usage. If the
population standard deviation of annual usage is 12.1 pounds, what
is the probability that the sample mean will be each of the
following?
a. More than 60 pounds
b. More than 56 pounds
c. Between 56 and 57 pounds
d. Less than 53 pounds
e. Less than 48 pounds