In: Statistics and Probability
The records of Check$mart Bank show that the average credit card balance of its customers is $3,325 with a standard deviation of $1,500. Assume that the distribution of these credit card balances is approximately normal.
(a) What is the probability that an account balance is less than $2,500?
(b) What is the probability that an account balance is more than $5,000?
(c) What is the probability that an account balance is between $3,000 and $4,000?
(d) 99% of account balances are less than which amount?