Question # 1

CD-ROM is a type of

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hard disk

soft disk

floppy disk

optical disk

Estimate is the observed value of an:

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Unbiased estimator

Estimation

Estimator

Interval estimation

P(μ-2σ < X=< μ + 2σ)=

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0.6827

0.9545

0.9973

0.9827

The probability associated with confidence interval is called:

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Level of confidence

Confidence coefficient

Both A and B

Confidence limits

Degree of linear relationship between two variables is called

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regression

association

correlation

disassociation

Large sample contains more than

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5 values

10 values

20 values

30 values

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b_yx

b_xy

S_p

1 MB equals _________byes

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1,094,265

1,904,265

1,048.576

The trend values in freehand curve method are obtained by:

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Equation of straight line

Second degree parabola

Signal

Graph

In normal distribution.

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Mean > median > mode

Mean = median = mode

Mean < median < mode

None of these

If Ho:π >πo , H1:π <πo and level of significance is=α then Ho will be rejected if

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Z < Z=α

Z=α/2 < Z

Z > Z1-α

Z < Z1-α

The difference between a statistic and the parameter is called_______.

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Random

Non-random

Sampling error

Probability

All odd order moments about mean are

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unique

zero

different

one

Another name of probability sampling is

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quota sampling

simple sampling

stratified sampling

random sampling

A part of the population is called

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parameter

statistic

sample

both b and c

If X and Y are independent, then Cov(x,y) = 0 which implies that

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b_yx = 0

b_xy = 0

ρ = 0

a = 0

If X - N (50,25), then=σ = ________.

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3

5

25

50

In simple linear regression, the number of unknown constants are:

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Two

Three

Four

Five

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