data averaging data_1 = [1,9,3,2]
data_2 = [8,4,6,5] data_avg = (data_1 + data_2) / 2 data summing and averaging data_sum = data_1 + data_2 data_avg = data_sum / 2 data difference from average data_diff_1 = data_1 - data_avg data_diff_2 = data_2 - data_avg
