F I L E In o rd e r to an s w e r th e fo llo w in g qu estio ns, use th e d a ta la b e le d H a p p in e s s a n d A g e on th e te x t w e b s ite .

a. Use Excel to e s tim a te a s im p le regression m o d e l w ith happ iness as th e respo nse v a ria b le an d a g e as th e e x p la n a to ry v aria b le .

b. Use th e e stim a te s to p re d ic t hap p in ess w h e n a g e equals 25 ,5 0 , a n d 75.

c. C o n stru ct a s c a tte rp lo t o f happ iness a g a in s t a g e . Discuss w h y y o u r p re d ic tio n s m ig h t n o t be accurate.