Calculate the 95% confidence intervals for the four different investments included in the following table. small stocks sp 500 corporate bonds...

Calculate the 95% confidence intervals for the four different investments included in the following table.

small stockss&p 500corporate bondst-bills

Average return

20.89 %11.64 %5.73 %4.78 %Standard deviation of returns42.08 %20.37 %6.37 %3.59 %

a) The 95% confidence interval of small stocks is between ____%  and ____ %

b) The 95% confidence interval of s&p 500 is between ____%  and ____ %c) The 95% confidence interval of corporate bonds is between ____%  and ____ %

d) The 95% confidence interval of t-bill is between ____%  and ____ %