Question # 1

Set of electronic instruction is

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Hardware

Software

Ouput device

None of these

Which index number may be weighted?

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Simple

Compositive

Both a and b

Fisher

Sum of random errors is equal to:

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Zero

2

3

None of these

If P(A) = 0.3, P(B) = 0.8, P(A C B)= 0.24, then the events A & B are

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Mutually exclusive

Equally likely

Independent

Not independent

If right tail is longer than the left tail,then distribution is called:

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Negatively skewed

Positively skewed

Symmetrical

None of these

The first moment about origin is equal to:

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Variance

Mode

Mean

Standard deviation

Var (ax + b ) is:

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a² var (x) + b

a var (x) - a²

a² var (x)

Zero

When the values are not of equal importance then we compute

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Simple mean

Weighted

Combined mean

None of these

The value of correlation co-efficient lies between

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0 to +1

-1 to 0

-0.5 to +0.5

-1 to +1

The total angle of pie chart is:

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90^o

1800^o

360^o

270^o

Which is correct regarding the normal distribution

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b₁ = 3

b₂ = 0

Q.D = 0.7979 S

Q1 = m 0.6745S

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