Chapter 6, Section 5, Exercise 234 Use a 1-distribution to find a confidence int

Question

Chapter 6, Section 5, Exercise 234 Use a 1-distribution to find a confidence interval for the difference in means -2 using the relevant sample results from paired data. Assume the results come from random samples from populations that are approximately normally distributed, and that differences are computed using d=X1-X2- A 99% confidence interval for 1-12 using the paired data in the following table: Case Treatment 21 28302427 Treatment 2 19 30 26 22 22 Give the best estimate for -H2, the margin of error, and the confidence interval Enter the exact answer for the best estimate, and round your answers for the margin of error and the confidence interval to two decimal places. best estimate margin of error= The 99% confidence interval is to

Explanation / Answer

The statistical software output for this problem is:

Paired T confidence interval:
D = 1 - 2 : Mean of the difference between Treatment 1 and Treatment 2
99% confidence interval results:

Hence,

Best estimate = 2.2

Margin of error = (7.7249161 - (-3.3249161))/2 = 5.52

99% confidence interval: -3.32 to 7.72

Difference Mean Std. Err. DF L. Limit U. Limit Treatment 1 - Treatment 2 2.2 1.2 4 -3.3249161 7.7249161

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