Private consumption as a share of GDP is a random quantity that follows a roughly normal distribution.

Question:

Private consumption as a share of GDP is a random quantity that follows a roughly normal distribution. According to an article in Business Week, for the United States that was about 71%. Assuming that this value is the mean of a normal distribution, and that the standard deviation of the distribution is 3%, what is the value of private consumption as share of GDP such that you are 90% sure that the actual value falls below it?

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...