Question # 1

If the observations are paired and the number of pairs is n, then the number of degree of freedom is equal to

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n

n - 1

2n

2n - 1

The process of making estimates about the population parameter from a sample is called:

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Statistical independence

Statistical inference

Statistical hypothesis

Statistical decision

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

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Confidence interval

Confidence coefficient

Confidence limits

Level of significance

If (1-α) is increased, the with of a confidence interval is:

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Decreased

Increased

Constant

Same

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

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biased

unbiased

positively biased

none of these

(1-α) is called:

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Critical value

Level of significance

Level of confidence

Interval estimate

The following statistic are unbiased estimators:

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The Sample mean

S² = Σ(X - X)²/n-1

The sample proportion

All the above

The distance between an estimate and the estimated parameter is called:

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Sampling error

Standard error

Bias

Error of estimation

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best estimators

biased estimators

unbiased estimators

normal estimators

Estimate is the observed value of an:

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Unbiased estimator

Estimation

Estimator

Interval estimation

The difference of upper and lower limits of confidence interval measures the

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level of significance

level of confidence

interval

precision

If mean of the sampling distribution is equal to the parameter then the estimator will be

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biased

consistent

sufficient

unbiased

An estimator is ------------ if its expected value is equal to the population parameter to be estimated

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bad

biased

unbiased

none of these

A single value used to estimate a population value is called:

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Interval estimate

Point estimate

Confidence interval

Level of confidence

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ICS Part 2 Statistics Chapter 12 Online Test MCQs With Answers

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