Question: 7. Consider Problem 6: (a) Without performing any calculations, what one value do you know for certain would fall in a 99% confidence interval for

7. Consider Problem 6:

(a) Without performing any calculations, what one value do you know for certain would fall in a 99% confidence interval for μ1 − μ2? (Explain.)

(b) Construct and interpret a 99% confidence interval for μ1 − μ2.

(c) What two factors contribute to the width of the confidence interval in Problem 7b?

(d) Construct and interpret a 95% confidence interval for μ1 − μ2.

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