Sample Correlation Coefficient

Wikipedia

# from scipy import stats
# from statistics import variance

x_array = [row[0] for row in dataset]
y_array = [row[1] for row in dataset]


print ('Stats Pearsonr: ', stats.pearsonr(x_array, y_array)[0])
print ('Numpy CorrCoef: ', np.corrcoef(x_array, y_array)[0,1])