Question

What is the correlation coefficient r?

An improvement project leader is trying to understand whether the length of time an assembled top cover is cured in an oven relates to the final strength of the adhesive bond of its assembly. The leader has collected data on some assemblies: how long they were allowed to cure in the oven (X); and how strong each adhesive bond (Y) was after curing. Below is the data for each assembly.

What is the correlation coefficient r? 

Please round your answer to two decimal places.

XiYi
26143
22146
22124
22141
20127
22122
1588
21128
17100
1082


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