Statistics Solutions

(See Solution) The monthly income of residents of Daisy City is normally distributed with a mean of $3000 and a standard deviation of $500. Define the random

Question: The monthly income of residents of Daisy City is normally distributed with a mean of $3000 and a standard deviation of $500.

  1. Define the random variable in words.
  2. 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?
  3. Individuals with incomes of less than $1,985 per month are exempt from city taxes. What percentage of residents is exempt from city taxes?
  4. What are the minimum and the maximum incomes of the middle 95% of the residents?
  5. Two hundred residents have incomes of at least $4,440 per month. What is the population of Daisy City ?

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