An article in Electronic Components and Technology Conference (2002, Vol. 52, pp. 1167-1171) compared single versus dual spindle saw processes for copper metallized wafers. A total of 15 devices of each type were measured for the width of the backside chipouts, Asingle = 66. 385, Ssingle = 7. 895 and Idouble = 45. 278, double = 8. 612. Use a = 0. 05 and assume that both populations are normally distributed and have the same variance. (a) Do the sample data support the claim that both processes have the same mean width of backside chipouts?



Answer :