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THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
In calculating the 95% confidence interval for μ1 - μ2 the difference between the means of two normally distributed populations,the summary statistics from two independent samples are:
nx = 10,
= 50,
= 0.64,ny = 10,
= 40,and
= 1.86.
-What is the lower confidence limit of the 95% confidence interval if the Population variances are unknown and are assumed to be equal?
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