Let X=\{11,12,13, . . . ., 40,41\} and Y=\{61,62, 63, . . . ., 90,91\} be the two sets of observations. If \overline{ {\x}} and \overline{ {\y}} are their respective means and \sigma^2 is the variance of all the observations in {\X} \cup {\Y}, then |\overline{ {\x}}+\overline{ {\y}}-\sigma^2| is equal to _______. [29-Jan-2023 Shift 2]

Statistics Part 1

Section: Mathematics

Question : 8 of 100

Marks: +1, -0

Let X={11,12,13,....,40,41} and Y={61,62, 63,....,90,91} be the two sets of observations. If x and y are their respective means and σ2 is the variance of all the observations in X∪Y, then |x+y−σ2| is equal to _______.

[29-Jan-2023 Shift 2]

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