Question # 1

Estimate is the observed value of an:

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Unbiased estimator

Estimation

Estimator

Interval estimation

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

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

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Interval estimate

Point estimate

Confidence interval

Level of confidence

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

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 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

Large sample contains more than

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5 values

10 values

20 values

30 values

Statistical inference has two branches namely:

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Level of confidence and degrees of freedom

Biased estimator and unbiased estimator

Point estimate and interval estimate

Estimation of parameter and testing of hypothesis

Small sample has less than

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50 values

45 values

30 values

35 values

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

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level of significance

level of confidence

interval

precision

A specific value of an estimator computed from the sample data is called

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estimation

estimate

interval estimate

point estimate

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

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The probability associated with confidence interval is called:

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Level of confidence

Confidence coefficient

Both A and B

Confidence limits

100(1-α)% confidence interval for population proportion of success,&=nbsp;π is

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P (L <μ < U) = 1 - α

P (L <σ < U) = 1 - α

P (L <π< U) = 1 - α

P (L <P&=nbsp;< U) = 1 - α

A range of values used to estimate an unknown population parameter is

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a point estimator

An interval estimator

an unbiased estimator

A biased estimator

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