Question

I WILL GIVE A MEDAL AND FAN WHOEVER HELPS ME!!!!!
You use a line of best fit for a set of data to make a prediction about an unknown value. The correlation coefficient for your data set is -0.015. How confident can you be that your predicted value will be reasonably close to the actual value?

Answer 1

what does the correlation coeff tell us?

Answer 2

I have no idea.

Answer 3

Im sorry

Answer 4

http://mathbits.com/MathBits/TISection/Statistics2/correlation.htm

this is what im reading to refresh myself on the subject

Answer 5

your CC is pretty far away from 1 or -1 ... and squaring it gives us: something less than 1% of the data can be explained by the regression line.

Answer 6

oh okay thank you!!!!

Answer 7

these seem like pretty low confidence levels to me ... but how to get a more precise value from it is beyond me.

Answer 8

thank you so much!

Answer 9

good luck :)