An investment portfolio contains stocks of a large number of corporations Over the last year the rates of return on these corporate stocks followed a normal distribution with mean 12 2 and standard deviation 7 2 a For what proportion of these corporations was the rate of return higher than 20 b For...

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An investment portfolio contains stocks of a large number of corporations. Over the last year the rates

Question:

An investment contains of a large number of corporations. Over the last year the rates of return on these corporate followed a normal with mean 12.2% and standard deviation 7.2%.
a. For what proportion of these corporations was the rate of return higher than 20%?
b. For what proportion of these corporations was the rate of return negative?
c. For what proportion of these corporations was the rate of return between 5% and 15%? Stocks
Stocks or shares are generally equity instruments that provide the largest source of raising funds in any public or private listed company's. The instruments are issued on a stock exchange from where a large number of general public who are willing... 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... Portfolio
A portfolio is a grouping of financial assets such as stocks, bonds, commodities, currencies and cash equivalents, as well as their fund counterparts, including mutual, exchange-traded and closed funds. A portfolio can also consist of non-publicly...