(2 marks) QUESTION 2 A company has organized one Seminar to all staff in order to reduce error in Project paper budget calculation. All 38 staff who ever making error in their previous project paper are being study. The seminar will be held for 1 months and they need to come out with one project paper with lesser error. Based on the data obtain before and after the Seminar, the statistician employ by the Company has analyzed the data to determine the effectiveness of the Seminar program. The result is shown as below: Paired Samples Test Paired Differences of Sig Mean Std. Std. 95% Confidence (2-tailed) Deviation Error Interval of the Mean Difference Lower Upper Error before - 9.4089 A 1.3931 6.58617 12.23169 6.754 37 000 Pair Error after the Seminar a) Calculate A. (2 marks) b) State the 95% confident interval for the above study. Does Seminar is effective? Why