765
78 + 84 = 162
81 - 3 = 78 81 - -3 = 84
81 84 87
84 * 78 = 80*70 + 80*8 + 4*70 + 4*8 = 5600 + 640 + 280 + 32 = 6552
87
83
The variance of 73 72 67 74 78 84 79 71 76 76 79 81 75 80 78 76 78 = 16.8456
78 + 84 = 162
84+73+78 = 235.
81 - 3 = 78 81 - -3 = 84
For 98 78 86 88 84 81 93 92 89 and 81: σ=6.2361
4 plus 80 = 84
400 - 78 - 22 --84 - 16 - 81 - 19 - 27 = 400 - 78 - 22 + 84 - 16 - 81 - 19 - 27 = 241
Median: 80 Mode: 72, 80, 120, 98, 78, 84, 77
84
81 84 87
78 appears more than any other number, so it is the mode.