Anchal B.
asked • 11/28/23Annual high temperatures in a certain location have been tracked for several years.
Let X represent the year and Y the high temperature. Based on the data shown below, calculate the correlation coefficient (to three decimal places) between X and Y.
Use your calculator!
x y
3 24.1
4 24.18
5 21.36
6 19.54
7 21.82
8 18.6
r =
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1 Expert Answer
Hi Anchal,
r is the Pearson correlation coefficient. It tells you how strong the relationship is between your explanatory (x) variable and response (y) variable. To get this value on TI-83 Plus, enter lists as you have done, then go: STAT-CALC-LinReg. r should show up at the bottom of the screen.
If this fails, turn the calculator off and back on, then go 2nd-0-scroll to "diagnostics on," then enter. This has historically been set automatically, but if you got the calculator used, it may not be.
You can find these instructions via an Internet search; sorry Wyzant does not allow me to post links here.
r= -0.849
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Natalie L.
What kind of calculator are you using? If a TI-83 or 84, you can locate regression analysis by hitting STAT --> CALC and then choosing the linear regression option. (You need to make sure that prior to doing this you have first entered the data into the lists (L1 & L2) in your calculator and that you have gone into the catalog or the calculator (2nd--> 0) and selected "Diagonostic On"). Let me know if that is the same type of calculator you are using and I can provide more details :)11/28/23