help me with my statistics homework

Question

67.7	101.8
7.3	-181.9
19.7	159.8
43.5	-730
45.7	426
53.9	-18.7
58	216.6
40.9	-74.2
46.8	204.5
43.5	216
35.6	302.5
37.1	-51.2
59.4	-453
18.6	238
248.9	-89.4

What is the correlation coefficient with the outlier?

r_w = 

What is the correlation coefficient without the outlier?

r_wo = 

Answer 1

You need to use a statistics program such as Excel or R or a calculator such as the TI 84 or Inspire to do this problem. You must first put the data into the calculator or spreadsheet. Then make a plot to see which point or points are outliers. The calculators and programs have functions to calculate correlation once you have the data in the calculator or program.

If you don't know how to use a statistics program or calculator, you should find an online tutorial or tutor for help. You must know how to use these if you are in a statistics course. For high school courses, the TI-84 calculator is most frequently used. College courses generally use various statistics programs. You will have been given access to the program as part of your course.

I can help with TI-84, TI-Inspire and Excel.

Good luck.

Answer 2

Hi there!

So I actually did find another student had asked the same question at this link which was answered: https://www.wyzant.com/resources/answers/843437/coefficient-with-and-without-the-outlier

However, I also included this video that goes into a bit more detail on how to solve this problem with the specific data you've given. I hope you find it helpful and the resources I've shared in the video useful! I understand, too, that even though it seems quite simple and straightforward, there are some nuances to tend to when doing this kind of computation.

Peace & Happy Learning!