Q: What is the median of 72 85 86 75 64 90 75 86?

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83

For 77 83 69 72 85 90 95 75 55 45: σ=15.4071

62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 87, 88.60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 87, 88, 90

The median is 86.

70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85 (including 70 and 85)

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Median of the set = arithmetic mean of 75 and 85 = 80

80

83

56, 57, 64, 65, 66, 75, 76 Mean: 65 and 4/7 Median: 65 Mode: There is no mode. Range: 20

meanAdd up the numbers and divide by how many there are: 87+75+89+81+90+73+85+96+65+92+78+79+83+85+79+90+86+72+74+88+81+85 = 1813There are 22 numbers.â‡’ mean = 1813 Ã· 22= 829/22â‰ˆ 82.41medianSort the numbers into order; the median is the middle number (if an odd number of numbers) or the mean of the middle two (if an even number of numbers): Sorted: 65, 72, 73, 74, 75, 78, 79, 79, 81, 81, 83, 85, 85, 85, 86, 87, 88, 89, 90, 90, 92, 96There are 22, so the median is the mean of the middle two which are the 11th (83) and 12th (85) numbers:â‡’ median = (83+85) Ã·2= 84modeThe number which appears the most often. Having sorted the list for the median, it can be seen that the one with the highest frequency appears three times: â‡’ mode = 85

85 is the median score.

72 73 79 75 76 81 81 85 88

The median is 82.

It is 85, the middle value, between 80 and 90.

For 77 83 69 72 85 90 95 75 55 45: σ=15.4071

62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 87, 88.60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 87, 88, 90

The median is 86.