Ross Company; Westerfield, Incorporated; and Jordan Company announced a new agreement to market thelr respectlve products in China on July $18,$ February $12,$ and October $7,$ respectively. Glven the Information below, calculate the cumulative abnormal return $($CAR$)$ for these stocks as a group. Assume all companles have an expected return equal to the market return.

Note: A negatlve value should be Indlcated by a minus sign. Leave no cells blank $-$ be certaln to enter $"0"$ wherever requlred. Do not round Intermedlate calculations. Round your answers to $1$ decimal place.

$\backslash$table$[[$Ross Company,Westerfield, Incorporated,Jordan Company$],[$Date$,\backslash$table$[[$Market$],[$Return$]],\backslash$table$[[$Company$],[$Return$]],,$Market,Company,,,Market,Company$],[$July $12,-0\mathrm{.}6,-0\mathrm{.}3,$February,Return,Return,Date,,Return,Return$],[$July $13,1\mathrm{.}2,0\mathrm{.}3,$February,$-0\mathrm{.}6,-0\mathrm{.}3,$october,$1,1\mathrm{.}4,0\mathrm{.}6],[$July $16,0\mathrm{.}4,0\mathrm{.}3,$February $1,-6\mathrm{.}7$

$9\mathrm{.}4,-0\mathrm{.}3,$october,$2,1\mathrm{.}3,0\mathrm{.}6],[$July $17,-0\mathrm{.}6,-0\mathrm{.}2,$February $1,\backslash$table$[[0\mathrm{.}4],[0\mathrm{.}6]],0\mathrm{.}6,$october,$3,6\mathrm{.}7,1\mathrm{.}3],[$July $18,-0\mathrm{.}8,1\mathrm{.}3,$February $1,\backslash$table$[[0\mathrm{.}6],[-0\mathrm{.}1]],2\mathrm{.}1,$October,$6,-0\mathrm{.}1,-0\mathrm{.}7],[$July $19,-1\mathrm{.}9,-0\mathrm{.}1,$February $1,1\mathrm{.}2,0\mathrm{.}1=,$october,$7,-2\mathrm{.}2,-0\mathrm{.}7],[$July $2,-0\mathrm{.}9,-1\mathrm{.}2,$February $1,0\mathrm{.}7,\backslash$table$[[1\mathrm{.}9],[0\mathrm{.}5]],$October,$8,1$:$2,0\mathrm{.}6],[$July $23,0\mathrm{.}6,0\mathrm{.}4,$February $1,-0\mathrm{.}1,\backslash$table$[[0\mathrm{.}5],[0\mathrm{.}0]],$october,$9,-0\mathrm{.}5,-0\mathrm{.}6],[$July $24,1\mathrm{.}2,0\mathrm{.}0,$February $1,1\mathrm{.}6,\backslash$table$[[0\mathrm{.}0],[0\mathrm{.}4]],$october,$10,0\mathrm{.}1,-0\mathrm{.}1]]$

$\backslash$table$[[\backslash$table$[[$Days from$],[$announcement$]],$Abnormal returns $(R_i-R_M),\backslash$table$[[$Average abnormal$],[$return$]],\backslash$table$[[$Cumulative$],[$average residual$]]],[$Ross$,$W'field,Jordan,Sum$],[-4,,,\sqrt[\phantom{2}]{2+2},,\frac{?}{\text{b}\text{a}\text{r}}(x+2),],[-3,,,,,,],[-2,,,\frac{?}{\text{b}\text{a}\text{r}}(x+2),,,],[-1,,,5,T,$Din,$],[0,,,5,,,2],[1,,,,5,,],[2,,,,+2,1+,\frac{?}{\text{b}\text{a}\text{r}}(x+2)$