11th Class Statistics MCQS Chapter 7

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11th Class Statistics MCQS
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If a is a constant then E(a) is equal to
Square of a
a
Zero
2a
E(y-) is equal to
y-
E(y)
zero
For a constant K ,the variance of K.
K
None of these
Zero
A-2
The Area of trapezoid is equal to:
sum of paralled sides x base/2
sum of paralled sides x base
2 x base x sum of paralled side
Sum of paralled sides x base/4
Variance of ?2 is equal E to (Y2) – _______?
[E(y)]2
None of these
E (y)
E(y2)
For two independent random variables, Var(x) = 14 and Var(Y ) = 5, then var (X-y) is equal to.
70
9
None of these
19
Var (3x+2)
3Var (X)
9Var(x) +2
3Var(x) + 2
Var (x) + 0
The sum of probabilities of events of a sample space is always.
Continuous
Discrete
Equal
Always greater then oen
F (+?) is always equal to:
None of these
One
0
Two
Hourly temperature recorded by weather brave is the example of:
Qualitative
Continuous variable
Discrete variable
Both A and B

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