THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

question 97

Multiple Choice

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
Independent random sampling from two normally distributed populations gives the following results:
n_x = 55,
= 520,σ_x = 30,n_y = 45,
= 482,and σ_y = 24
-Find the margin of error for a 98% confidence interval for the difference in the means of the two populations.

• A)8.50
• B)19.86
• C)15.77
• D)12.58

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