Math Solutions

(Step-by-Step) A bank in Chicago determined that the yearly interest earned by its checking-account customers is approximately normally distributed with

Question: A bank in Chicago determined that the yearly interest earned by its checking-account customers is approximately normally distributed with a mean of $615 and a standard deviation of $120.

  1. What proportion of the customers earned between $500 and $750 in interest last year?
  2. What proportion earned more than $400?
  3. What proportion earned $250 or less?
  4. Forty-five percent of the customers earned under what amount of interest? (HINT: inside out problem)

Price: $2.99
Solution: The downloadable solution consists of 2 pages
Deliverable: Word Document


∴ Other downloads you may be interested in ∴

log in to your account

Forgot password?
Don't have a membership account?
REGISTER

reset password

Back to
log in

sign up

Back to
log in