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Chapter 7.4, Problem 12P

(a)

To determine

Check the sample mean by using the calculator.

Check the sample standard deviation by using the calculator.

(b)

To determine

Find the 80% confidence interval for μ1μ2.

(c)

To determine

Interpret the confidence interval in the context of the problem.

Identify whether the interval consist of numbers that are all positive or all negative or of different signs.

Explain whether one region is more interesting than the other from a geochemical perspective at 80% level of confidence.

(d)

To determine

Identify and explain the distribution that is used for calculating interval.

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Chapter 7 Solutions

Bundle: Understandable Statistics: Concepts And Methods, 12th + Jmp Printed Access Card For Peck's Statistics + Webassign Printed Access Card For ... And Methods, 12th Edition, Single-term

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