The monthly income of residents of Daisy City is normally distributed with a mean of $3000 and a standard deviation of $500
a. The mayor of Daisy City makes $2,250 a month. What percentage of Daisy City's residents has incomes that are more than the mayor's?
b. Individuals with incomes of less than $1,985 per month are exempt from city taxes. What percentage of residents is exempt from city taxes?
c. What are the minimum and the maximum incomes of the middle 95% of the residents?
d. Two hundred residents have incomes of at least $4,440 per month. What is the population of Daisy City?
a. 93.32%
b. 2.12%
c. Min = 2020 Max = 3980
d. 100,000
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