A recent report indicated a typical family of five spends $650 per month on food. Assume the distribution of food expenditures for a family of five follows a normal distribution, with a mean of $650 and a standard deviation of $120. A sample of 64 is taken.
a. What percentage of the families spends more than $675 per month on food?
b. What percentage of the families spends less than $660 per month on food?
c. What percentage spends between $660 and $670 per month on food?
d. What percentage spends less than $650 or more than $675 per month on food?