THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

question 107

Multiple Choice

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:
n_x = 10,
= 50,
= 0.64,n_y = 10,
= 40,and
= 1.86.
-What is the upper confidence limit of the 95% confidence interval if the Population variances are unknown and are assumed to be equal?

• A)11.050
• B)11.072
• C)12.056
• D)10.980

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