Question
In: Statistics and Probability
You may need to use the appropriate appendix table or technology to answer this question. Recall...
You may need to use the appropriate appendix table or technology to answer this question.
Recall the method used to obtain a confidence interval for the difference between two population means for matched samples.
(a) The following data are from matched samples taken from two populations. Compute the difference value for each element.
| Element | Population | |
|---|---|---|
| 1 | 2 | |
| 1 | 11 | 9 |
| 2 | 7 | 9 |
| 3 | 9 | 7 |
| 4 | 12 | 8 |
| 5 | 13 | 11 |
| 6 | 15 | 16 |
| 7 | 15 | 15 |
(b) Compute d.
(c) Compute the standard deviation sd.
(d) What is the point estimate of the difference between the two population means?
(e) Provide a 95% confidence interval for the difference between the two population means.
Solutions
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