Summary statistics computed from two independent samplesare as follows: n1 = 50

Summary statistics computed from two independent samplesare as follows: n1 = 50 x1 = 175 s1 = 18.5 n2 = 42 x2 = 158and s2 = 32.4. Construct a 95% confidence interval estimate for thedifference between the means of two normally distributedpopulations where the unknown population variances are assumed tonot be equal. The upper confidence limit is