Question: . Companies that sell stock mutual funds charge their investors expense fees to offset the costs of research and administrative activities. In 2007, the average expense fee as expressed as a percentage of total assets invested in the fund was .96% with a standard deviation of .33%.

a) Find the probability that a stock mutual fund has an expense fee less than 1.4%.

b) Find the probability that a stock mutual fund has an expense fee more than 1.2%.

c) Find the probability that a stock mutual fund has an expense fee between .87% and .93%.

d) What proportion of stock mutual funds has an expense fee less than .75% or more than 1.25%?

e) The expense fee for 87% of stock mutual funds is less than what value?