Question # 1

If the null hypothesis is false, we many accept it leading to a ----------- decision

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true

correct

wrong

none of these

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best estimators

biased estimators

unbiased estimators

normal estimators

The normal distribution is represented as_______

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N (μ,σ²)

N (n,p)

N (0,σ²)

None of these

A range of values within which the population parameter is expected:

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Confidence interval

Confidence coefficient

Confidence limits

Level of significance

Confidence intervals which are often used in practice are

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90%

95%

98%

all of these

A hypothesis that specifies all the value of parameter is called:

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Statistical hypothesis

Simple hypothesis

Composite hypothesis

None of these

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b_yx

b_xy

S_p

Second moment about mean is also called

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mean

variance

skewness

standard deviation

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6Σd₁

5Σd¹

Points of inflexion of normal curve are at

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μ and σ

x=μ-σ and x=μ+σ

μ and 2σ

μ = o

One byte equal:

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4 bits

6 bits

8 bits

12 bits

The alternative hypothesis is also called:

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Null hypothesis

Statistical hypothesis

Research hypothesis

Simple hypothesis

If 6Σd²/n(n² - 1) is zero, the value of r_s is ________.

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0.5

1

-1

0

All odd order moments about mean are

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unique

zero

different

one

For a least squares linear trend ŷ = a + bx, the Σ(y-ŷ)² = 0 when

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all the y-values lie on the line

all the y-values are positive

all the y-+values lie above the line

none of these

The sum of deviations=Σ(y-ŷ) =

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0

1

10

-1

A statement about the value of a population parameter is called:

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Null hypothesis

Alternative hypothesis

Simple hypothesis

Composite hypothesis

Commonly used input device is

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pen

keyboard

monitor

joystick

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