Range: A stock's expected return is: $15\%$ and the standard deviation is: $3\mathrm{.}8\%.$ What range of returns, with a $95\%$ confidence level, will contain the stock true expected returns next year?

Range: A stock's expected return is: $15\%$ and the standard deviation is: $3\mathrm{.}8\%.$ What range of returns, with a $95\%$ confidence level, will contain the stock true expected returns next year?

$7\mathrm{.}4\%-22\mathrm{.}6\%$

$3\mathrm{.}6\%-26\mathrm{.}4\%$

$11\mathrm{.}2\%-18\mathrm{.}8\%$

$15\%-3\mathrm{.}8\%$