Question # 1

if X and Y are independent random varaibesl the S.D. (X-Y) is equal to

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Var (X) - var (Y)

Var (X) + Var (Y)

E(X-Y)2

E(X + Y)2

When we draw the sample with replacement (the first sample is replaced before the next draw), the probability distribution to be used is:

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Binomial

Hypergeometric

Both Binomial & hypergeometric

None of these

Binomial distribution is positively skewed

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P < 1/2

P > 1/2

P = 1/2

P < q < ¹/₂

The probability of even/odd number when a fair die rolled is:

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1/6

2/6

1/36

3/6

If X and Y are independent random variables , the E (XY) is equal to.

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E(XY)

E(X) E(Y)

XE(Y)

YE(X)

Probility density function is the probebilyt function of.............. random variable.

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Discrete

Qualitative

Continuous

None

Which of the following is true for binomial distribution

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Mean > variance

Mean < variance

Mean = variance

Mean + standard deviation

Mean of hypergeometric distribution is

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np

Nnk

If X and Y are random varaibes, than E ( X - Y) is equal to.

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E(X) + E (Y)

E(X) - E(Y)

X - E (Y)

E(X) - Y

The parameters of the binomial distributions are

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x and n

x and p

p and q

n and p

If we do not replace the draw cards back into the pack before the next draw, the used probability distribution will be:

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Binomial

Hypergeometric

Both binomial & hypergeometric

None of these

Random numbers are generated from the single digit numbers.

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{ 1,2,3,............. 10 }

{ 0, 1,2,.......................... 10}

{ 0,1,2.............}

{0,1,2,............. 9}

A fair coin is tossed four times the probability of getting four heads is

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1/4

1/2

4/6

1

The binomial distribution deal with:

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Discrete variable

Continuous variable

None of these

Mean, Median and mode of binomial distribution can be equal if

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P < q < 1/2

P > q < 1/2

P ≠ q

The probabilyt that a continous random varaibe 'x ' takes on specific value of x is.

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Greater thaan zero

Less than zero

Equal to Zero

0 to 1

If (E(X) = E than find arithmetic means will be.

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1

4

0

8

The repeated trials of binomial experiments are

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Dependent

Independent

Fixed

Variable

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Statistics Ics Part 1 Chapter 8 Online Test MCQs With Answers

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