--------------------------------------------------------------------------------
       log:  C:\Documents and Settings\Patricia_Anderson\My Documents\ECON 20\In
> Class\oct4.log
  log type:  text
 opened on:   4 Oct 2002, 11:12:32

. reg salary sales ceoten mktval

      Source |       SS       df       MS              Number of obs =     177
-------------+------------------------------           F(  3,   173) =   14.53
       Model |  12230632.6     3  4076877.52           Prob > F      =  0.0000
    Residual |  48535332.2   173  280551.053           R-squared     =  0.2013
-------------+------------------------------           Adj R-squared =  0.1874
       Total |  60765964.7   176  345261.163           Root MSE      =  529.67

------------------------------------------------------------------------------
      salary |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
       sales |   .0190191   .0100561     1.89   0.060    -.0008294    .0388676
      ceoten |   12.70337   5.618052     2.26   0.025     1.614616    23.79211
      mktval |   .0234003   .0094826     2.47   0.015     .0046839    .0421167
       _cons |   613.4361   65.23685     9.40   0.000     484.6735    742.1987
------------------------------------------------------------------------------

. **calculate a conf interval by hand
. display .019 + (1.96*.01)
.0386

. use saving, clear

. desc

Contains data from saving.dta
  obs:           100                          
 vars:             7                          13 Sep 2000 15:38
 size:         1,400 (100.0% of memory free)
-------------------------------------------------------------------------------
              storage  display     value
variable name   type   format      label      variable label
-------------------------------------------------------------------------------
sav             int    %9.0g                   annual savings, $ (1970)
inc             int    %9.0g                  annual income, $  (1970) 
size            byte   %9.0g                  family size
educ            byte   %9.0g                  years education, household head
age             byte   %9.0g                  age of household head
black           byte   %9.0g                  =1 if household head is black
cons            int    %9.0g                  annual consumption, $ (1970) 
-------------------------------------------------------------------------------
Sorted by:  

. reg cons inc

      Source |       SS       df       MS              Number of obs =     100
-------------+------------------------------           F(  1,    98) =  219.89
       Model |  2.2480e+09     1  2.2480e+09           Prob > F      =  0.0000
    Residual |  1.0019e+09    98  10223460.8           R-squared     =  0.6917
-------------+------------------------------           Adj R-squared =  0.6886
       Total |  3.2499e+09    99  32827569.0           Root MSE      =  3197.4

------------------------------------------------------------------------------
        cons |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
         inc |   .8533717   .0575488    14.83   0.000      .739168    .9675753
       _cons |  -124.8424   655.3931    -0.19   0.849    -1425.449    1175.764
------------------------------------------------------------------------------

. **calculate our own t to test if beta=1
. (.853-1)/.058
unrecognized command:  ( invalid command name
r(199);

. display (.853-1)/.058
-2.5344828

. display ttail(98,2.53)
.00649984

. **2 show that this is one-sided use 1.96
. display ttail(10000, 1.96)
.02501176

. display ttail(98,2.53)*2
.01299969

. log, close
, invalid
r(198);

. log close
       log:  C:\Documents and Settings\Patricia_Anderson\My Documents\ECON 20\I
> nClass\oct4.log
  log type:  text
 closed on:   4 Oct 2002, 12:19:44
-------------------------------------------------------------------------------