{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Chapter 9 HW

# Chapter 9 HW - try plotting the points b Calculate the...

This preview shows pages 1–3. Sign up to view the full content.

Chapter 9 Consider the pairs of data sets given below, which have the given five statistic summaries. 7 7 3 5 4 4 1 3 5 1 B A 4 5 5 8 6 6 7 4 8 2 D C A Average: 4 A SD: 2 C Average: 5 C SD: 2 B Average: 4 B SD: 2 D Average: 6 D SD: 1.414 r = 0.400 r = -0.707 For Problems 1-5, compare the pair of data sets with the above pairs, looking for changes of scale. State the changes and the new five statistic summary based on that change. 1. 7 8 3 6 4 5 1 4 5 2 Y X 2. 14 7 6 5 8 4 2 3 10 1 Y X 3. 3 1 5 . 3 4 4 2 5 . 4 0 5 2 - Y X

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
4. 11 13 13 22 15 16 17 10 19 4 Y X 5. 3 15 1 11 0 9 3 7 1 3 - - Y X 6. a) Calculate the five statistic summary for the following pair of data sets: 13 70 5 50 7 40 1 30 9 10 - - - - - Y X b) Add the point (100, 0) to the list from a). What is the new five statistic summary? Did adding just this one point make a lot of difference? 7. Consider the pair of data sets given below. 2 2 1 1 0 0 1 1 2 2 - - Y X a) Is there are functional relationship between X and Y ? ( Hint:
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: try plotting the points) b) Calculate the correlation coefficient. c) Why aren’t your answers from a) and b) in contradiction? (Hint: what does r measure?) 8. Does interchanging the axes on a scatter plot change the correlation coefficient? 10.00 5.00 0.00 X 10.00 8.00 6.00 4.00 2.00 0.00-2.00 Y For Problems 9 and 10, state which two scatter plots have the same correlation coefficient. 9. 10. 3.00 2.50 2.00 1.50 1.00 X 10.00 8.00 6.00 4.00 2.00 0.00-2.00 10.00 5.00 0.00 X 10.00 8.00 6.00 4.00 2.00 0.00-2.00 0.00-1.00-2.00-3.00-4.00-5.00 X 10.00 5.00 0.00-5.00-10.00 10.00 5.00 0.00-5.00-10.00 X 0.00-1.00-2.00-3.00-4.00-5.00 10.00 5.00 0.00-5.00-10.00 X 10.00 8.00 6.00 4.00 2.00 0.00...
View Full Document

{[ snackBarMessage ]}