Directions: Look at the following data : Measurements of some variable X were made at an interval of 1 minute from 10 A.M. to 10:20 A.M. The data, thus, obtained is as follows : X : 60, 62, 65, 64, 63, 61, 66, 65, 70, 68 63, 62, 64, 69, 65, 64, 66, 67, 66, 64The sum of deviation taken from which of the descriptive statistical measure is always equal to zero?

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Directions: Look at the following data : Measurements of some variable X were made at an interval of 1 minute from 10 A.M. to 10:20 A.M. The data, thus, obtained is as follows : X : 60, 62, 65, 64, 63, 61, 66, 65, 70, 68 63, 62, 64, 69, 65, 64, 66, 67, 66, 64<br>The sum of deviation taken from which of the descriptive statistical measure is always equal to zero?