Answer
Bond mutual funds: $Proportion=\frac{5}{8}=0.625$
Stock mutual funds: $Proportion=\frac{5}{8}=0.625$
Work Step by Step
Bond mutual funds:
$x̅-1s=2.375-0.669=1.706$ and $x̅+1s=2.375+0.669=3.044$
So, 2.0, 2.4, 2.7, 1.8, 1.9 are within one standard deviation of the mean; that is, there are 5 observations within one standard deviation of the mean.
$Proportion=\frac{5}{8}=0.625$
Stock mutual funds:
$x̅-1s=8.0125-0.903=7.1095$ and $x̅+1s=8.0125+0.903=8.9155$
So, 8.4, 7.4, 8.1, 7.6, 7.2 are within one standard deviation of the mean; that is, there are 5 observations within one standard deviation of the mean.
$Proportion=\frac{5}{8}=0.625$
