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Q: What is the mean of 78 79 80 80 81 81 81?

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78 + 79 + 80 + 80 + 81 + 81 = 479

The variance of 73 72 67 74 78 84 79 71 76 76 79 81 75 80 78 76 78 = 16.8456

There are an infinite number of sets with mean 80. Here are some: {80, 80, 80}, {80, 80, 80, 80, 80, 80} {79, 80, 81}, {79, 79, 80, 81, 81}, {79, 79, 80, 82} (1, 80, 159}, {-40, 200} To produce a set of n numbers with mean 80, start with any set of n-1 numbers. Suppose their sum is S. Then add the number 80*n-S to the set. You will now have n numbers whose sum is S+80*n-S = 80*n So the mean of this set is 80.

The mean is 83.

71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100! :)

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78 + 79 + 80 + 80 + 81 + 81 = 479

The variance of 73 72 67 74 78 84 79 71 76 76 79 81 75 80 78 76 78 = 16.8456

the mean is 79.75

83

There are an infinite number of sets with mean 80. Here are some: {80, 80, 80}, {80, 80, 80, 80, 80, 80} {79, 80, 81}, {79, 79, 80, 81, 81}, {79, 79, 80, 82} (1, 80, 159}, {-40, 200} To produce a set of n numbers with mean 80, start with any set of n-1 numbers. Suppose their sum is S. Then add the number 80*n-S to the set. You will now have n numbers whose sum is S+80*n-S = 80*n So the mean of this set is 80.

There are an infinite list of different sets of 5 that do that.If their mean is 80, then the only thing you know about them is that they add up to 400.Here's one set:78, 79, 80, 81, 82Here's another one:79, 81, -600, 400, 440.The mean doesn't tell us anything about what the individual numbers must be.

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)

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

79 & 81, or any whole number from 1 to 79 with any whole number greater than 81.

trevor brooking

median is 79. Write in order; median is middle number: {72, 89, 67, 81, 75, 79, 81, 80, 62, 64, 83} → {62, 64, 67, 72, 75, 79, 80, 81, 81, 83, 89} To find middle number, count the number of data items, add 1 and divide by 2. If this is a whole number, that is the data item which is the median; if it is a fraction, take the mean average of the data items of the positions either side of the fraction (eg if the fraction is 3.5, take the mean average of the 3rd and 4th data items) There are 11 data items → median is (11+1)/2 = 6th data item → median is 79

Take I-79 NORTH to I-80 EAST to CLARION at EXIT 116A.Take I-80 EAST to I-81 NORTH to WILKES-BARRE and SCRANTON at EXIT 260B (LEFT EXIT).Take I-81 NORTH to Wilkes-Barre.You can remember the route by just thinking 79 80 81.

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