Question # 1

Confidence intervals which are often used in practice are

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90%

95%

98%

all of these

Regression line x on y is

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___________ is a set of electronic instructions:

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Hardware

Software

Hard disk

Compact disk

Level of significance is denoted by

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2 - α

3 - α

α

1 - α

The probability associated with confidence interval is called:

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Level of confidence

Confidence coefficient

Both A and B

Confidence limits

A statistic on the basis of which a decision is made about the hypothesis of interest is called

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critical region

test statistic

parameter

rejection region

The degree of relationship between the two attributes is called

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regressor

correlation

regressand

association

The alternative hypothesis is also called:

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Null hypothesis

Statistical hypothesis

Research hypothesis

Simple hypothesis

CD-ROM is a type of _________.

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Optical disk

Hard disk

Soft disk

Compact disk

If Ho: μ <μoand H1:μ <μoand level of significance is=α then Ho will be rejected if

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Z < Z=α

Z < Z=α/2

Z < Z 1-α

Z < Z1-α/2

For a least squares linear trend=ŷ= a + b x,

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Σy <Σŷ

Σŷ = 0

Σy =Σŷ

none of these

The two attribute A and B are positively associated, if _________.

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(AB) = (A)(B)/n

(AB) < (A)(B)/n

(AB) ≠ (A)(B)/n

(AB) > (A)(B)/n

Methods of semi-averages gives an

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accurate result

objective result

authentic result

none of these

If population proportion (P) is unknown, the standard error of the sample proportion (p) can be estimated by the formula

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Small sample has less than

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50 values

45 values

30 values

35 values

The value of the coefficient of correlation relies between__________.

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-1 and +1

0 and 1

-1 and 0

-0.5 and + 0.5

If critical region is located equally in both tails of the sampling distribution of test statistic, the test is called ------------- test

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one tailed

two tailed

left tailed

right tailed

The equation of the quadratic (parabolic) trend is

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ŷ=a+bx

ŷ=a+by

ŷ=a+bΣx+cΣx²

ŷ=a+bx+cx²

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