P3/10E

                  SIMPLE LINEAR REGRESSION - PRACTICAL

   It  is  considered  that a linear regression model may be appropriate
for the analysis of the following data, consisting of 11 observations of
a response variable y and an explanatory variable x.  Analyse  the  data
and, in particular, find 95% confidence intervals for

      (a) the slope of the regression line;

      (b) the expected value of y, given x = 10.

Plot the data, and comment on any significant features revealed.


                              x          y

                             8.0       21.20
                             8.0       18.74
                             8.0       21.98
                             8.0       19.70
                             8.0       22.66
                             8.0       19.32
                             8.0       21.62
                             8.0       20.91
                             8.0       20.13
                             8.0       20.44
                            19.0       23.75