a$.$ What is the sample mean years to maturity for corporate bonds and what is the sample standard deviation?

b$.$ Develop a $95\%$ confidence interval for the population mean years to maturity. Round the answer to two decimal places.

$($

years

c$.$ What is the sample mean yield on corporate bonds and what is the sample standard deviation?

Mean

$\%($to $4$ decimals$)$

Standard deviation

$\%($to $4$ decimals$)$Years to Maturity Yield Years to Maturity Yield

$12\mathrm{.}257\mathrm{.}13016\mathrm{.}006\mathrm{.}860$

$4\mathrm{.}502\mathrm{.}5895\mathrm{.}004\mathrm{.}001$

$28\mathrm{.}752\mathrm{.}24021\mathrm{.}003\mathrm{.}265$

$22\mathrm{.}752\mathrm{.}34818\mathrm{.}752\mathrm{.}964$

$17\mathrm{.}257\mathrm{.}97327\mathrm{.}503\mathrm{.}442$

$28\mathrm{.}002\mathrm{.}22711\mathrm{.}507\mathrm{.}993$

$26\mathrm{.}008\mathrm{.}0715\mathrm{.}753\mathrm{.}729$

$20\mathrm{.}004\mathrm{.}1742\mathrm{.}503\mathrm{.}732$

$26\mathrm{.}753\mathrm{.}14929\mathrm{.}751\mathrm{.}794$

$1\mathrm{.}753\mathrm{.}0121\mathrm{.}004\mathrm{.}589$

$17\mathrm{.}505\mathrm{.}71010\mathrm{.}002\mathrm{.}013$

$6\mathrm{.}757\mathrm{.}64924\mathrm{.}254\mathrm{.}263$

$8\mathrm{.}757\mathrm{.}19013\mathrm{.}254\mathrm{.}915$

$15\mathrm{.}506\mathrm{.}72914\mathrm{.}006\mathrm{.}242$

$19\mathrm{.}502\mathrm{.}1395\mathrm{.}003\mathrm{.}541$

$24\mathrm{.}001\mathrm{.}61725\mathrm{.}256\mathrm{.}757$

$3\mathrm{.}757\mathrm{.}17410\mathrm{.}754\mathrm{.}336$

$22\mathrm{.}502\mathrm{.}23221\mathrm{.}256\mathrm{.}851$

$9\mathrm{.}756\mathrm{.}0727\mathrm{.}503\mathrm{.}721$

$14\mathrm{.}507\mathrm{.}4277\mathrm{.}756\mathrm{.}315$