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GATE 2020 : Engg. Mathematics Quiz 7 (App update required to attempt this test)

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Question 1

E[X] = 1 and Var [X] = 2, which one of the following is not correct.

Question 2

Find the standard deviation of 2,4,6 and 8. (Round upto two decimal places)

Question 3

Consider the following table:

Assume X is a random variable. what is the mean value?

Question 4

Consider a finite sequence of random values X = [x1, x2,…………, xn] Let μx be the mean and x be the standard deviation of X. Let another finite sequence Y of equal length be derived from this as where a and b are positive constants. Let μy be the mean and σy be the standard deviation of this sequence. Which one of the following statements is INCORRECT?

Question 5

Consider the table given below

Then the arithmetic mean of the marks given below would be,

Question 6

Given a PDF, f(x)= x/12, 1≤ x≤ 5 .

What is the variance of the given function_______________ (Round upto 2 decimal places).

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Jun 22GATE & PSU CS