A corporation owns several companies. The strategic
planner for the corporation believes dollars spent on advertising
can to some extent be a predictor of total sales dollars. As an aid
in long-term planning, she gathers the following sales and
advertising information from several of the companies for 2017 (in
millons)
advertising($12.5 , 3.7 ,21.0 ,60.0 ,37.6 ,6.1 ,17.9 ,41.2 )
sales($141, 55 ,338 ,994 ,541 ,89 ,126 ,379)
Construct a 98% confidence interval for the average
value of y for the given...