2. TWo types of flares are tested for their burning times (in minutes) and sampie results are given below. Brand X Brand Y x 19.4 S = 2.4 S = 0.8 n=35 n=40 x= 15.1 Construct a 95 % Confidence interval for the difference µ – Hy based on the sample

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A: n1 = 28n2 = 30 x1 = 24x2 = 22 s1 = 8s2 = 6

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A: We have given that Sample size n1=400 ,n2=200 And sample proportion p1= 0.46 ,p2^=0.34