Returns for the Dayton Company over the last $3$ years are shown below. What's the standard deviation of the firm's returns? $($Hint: This is a sample, not a complete population, so the sample standard deviation formula should be used.$)$ Do not round your intermediate calculations.

Year

Return

$2013$

$21\mathrm{.}00\%$

$2012$

$-12\mathrm{.}50\%$

$2011$

$12\mathrm{.}50\%$

$$

Returns for the Dayton Company over the last $3$ years are shown below. What's the standard deviation of the firm's returns? $($Hint: This is a sample, not a complete population, so the sample standard deviation formula should be used.$)$ Do not round your intermediate calculations.

Year

Return

$2013$

$21\mathrm{.}00\%$

$2012$

$-12\mathrm{.}50\%$

$2011$

$12\mathrm{.}50\%$

$$

$19\mathrm{.}33\%$

$17\mathrm{.}41\%$

$15\mathrm{.}85\%$

$16\mathrm{.}37\%$

$21\mathrm{.}59\%$

Question at position $30$

$30$

$1$ point

Question at position $30$

Tom Noel holds the following portfolio:

Stock

Investment

Beta

A

$$150,000$

$1\mathrm{.}40$

B

$$50,000$

$0\mathrm{.}80$

C

$$100,000$

$1\mathrm{.}00$

D

$$75,000$

$1\mathrm{.}20$

Total

$$375,000$

Tom plans to sell Stock A and replace it with Stock E$,$ which has a beta of $0\mathrm{.}60.$ By how much will the portfolio beta change? Do not round your intermediate calculations.

Tom Noel holds the following portfolio:

Stock

Investment

Beta

A

$$150,000$

$1\mathrm{.}40$

B

$$50,000$

$0\mathrm{.}80$

C

$$100,000$

$1\mathrm{.}00$

D

$$75,000$

$1\mathrm{.}20$

Total

$$375,000$

Tom plans to sell Stock A and replace it with Stock E$,$ which has a beta of $0\mathrm{.}60.$ By how much will the portfolio beta change? Do not round your intermediate calculations.

$0\mathrm{.}378$

$0\mathrm{.}342$

$0\mathrm{.}371$

$0\mathrm{.}275$

$0\mathrm{.}320$