Stock returns vary from year to year. The more variance a stock displays the greater the potential risk. These are the rates of return for a stock over the last five years. Calculate the variance of these investment retums: 10, 30, 15, 5, 20. Hint: The variance of
a series of numbers is the sum of the squares of their differences from the mean (average) of the numbers divided by the number of items
In the series

Hanna intends to give her granddaughter, melodee, her antique hat pin. this heirloom has been kept under lock and key in the wall vault in the library of hanna's house in virginia. the hat pin is currently the only item in the vault. when hanna is visiting melodee in connecticut, hanna gives melodee the only key to the vault. melodee is grateful for the present and excitedly accepts. in this situation has there been a completed gift?

Afood worker has just rinsed a dish after cleaning it.what should he do next?

Consider the following information on stocks a, b, c and their returns (in decimals) in each state: state prob. of state a b c boom 20% 0.27 0.22 0.16 good 45% 0.16 0.09 0.07 poor 25% 0.03 0 0.03 bust 10% -0.08 -0.04 -0.02 if your portfolio is invested 25% in a, 40% in b, and 35% in c, what is the standard deviation of the portfolio in percent? answer to two decimals, carry intermediate calcs. to at least four decimals.