Find Pearson's correlation coefficient (r) for the sample data given below.

Pearson r Activity 1 X 93 91 A research study was conducted 89 86 to determine the correlation between student's grades in 84 80 English and their grades in 71 88 Mathematics. A random sample 90 89 of 10 students of Business 83 87 Administration of a certain 75 78 university were taken and the 81 78 results of sampling are tabulated 84 85 below. 77 76 Alpha = 0.05