Assuming you mean the arithmetic mean, it is 80.
The variance of 73 72 67 74 78 84 79 71 76 76 79 81 75 80 78 76 78 = 16.8456
83
78
There are infinitely many. Involving integers (whole numbers) there are: 0 + 80, 1 + 79, 2 + 78, .... 78 + 2, 79 + 1, 80 + 0, 81 + -1, 82 + -2, ..... When you include non-integers there are: ½ + 79½, 1½ + 78½, ... 1.1 + 78.9, 1.2 + 78.8, .... 3.1 + 76.9, 3.14 + 76.86, 3.141 + 76.859, 3.1415 + 76.8585, 3.14159 + 76.85841, ...., π + (80 - π)
Assuming you mean the arithmetic mean, it is 80.
The variance of 73 72 67 74 78 84 79 71 76 76 79 81 75 80 78 76 78 = 16.8456
83
The answer is 711. Simply add up all of the numbers arithmetically like you would for two plus two. To make sure the answer is correct, check your work using a calculator.
81
765
the mean is 79.75
78
80+1 = 81
There are infinitely many. Involving integers (whole numbers) there are: 0 + 80, 1 + 79, 2 + 78, .... 78 + 2, 79 + 1, 80 + 0, 81 + -1, 82 + -2, ..... When you include non-integers there are: ½ + 79½, 1½ + 78½, ... 1.1 + 78.9, 1.2 + 78.8, .... 3.1 + 76.9, 3.14 + 76.86, 3.141 + 76.859, 3.1415 + 76.8585, 3.14159 + 76.85841, ...., π + (80 - π)
237
PLAYER RATINGS AND ACTUAL POSITIONS CM Fabregas 87 CF v Persie 86 CAM Nasri 85 LW Arshavin 83 CB Vermaelen 83 RB Sagna 83 ST Chamakh 81 RW Walcott 81 LWB Clichy 81 CAM Rosickey 81 CDM Song 81 Cm Wilshire 80 CB Koscielney 80 CB Squillaci 80 CM Diaby 79 ST Bendtner 79 RM Eboue 79 CM Denilson 78 CB Djourou 78 GK Almunia 78 LWB Gibbs 77 CM Ramsey 77 LF Vela 77 GK Fabianski 75 GK Szczesny 71