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A 95% confidence interval for a difference in means 1-2 if the samples have n1=140 with x1=242 and s1=49 and n2=100 with x2=235 and s2=47,

A 95% confidence interval for a difference in means 1-2 if the samples have n1=140 with x1=242 and s1=49 and n2=100 with x2=235 and s2=47, and the standard error is SE=6.26. Find 95% confidence interval

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