Review the STATA regression output below.

. regress y x

      Source |       SS           df       MS      Number of obs   =       100
-------------+----------------------------------   F(1, 98)        =    138.26
       Model |  130.617357         1  130.617357   Prob > F        =    0.0000
    Residual |  92.5804575        98  .944698546   R-squared       =    0.5852
-------------+----------------------------------   Adj R-squared   =    0.5810
       Total |  223.197814        99  2.25452338   Root MSE        =    .97196

------------------------------------------------------------------------------
           y |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
           x |    1.06598   .0906558    11.76   0.000     .8860771    1.245884
       _cons |    2.01138   .0972237    20.69   0.000     1.818443    2.204317
------------------------------------------------------------------------------

What is the standard deviation of the variable y?