Right. Thanks Halflife :)
Width of the 95% confidence interval : (1.96)(s/√n) = 19.6 ~ 20. So (b). If you reply to this email, your message will be added to the discussion below: http://discussion-forum.2150183.n2.nabble.com/DSE-solutions-tp7605344p7605545.html To unsubscribe from DSE solutions, click here. NAML