Question # 1

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

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biased

consistent

sufficient

unbiased

(1-α) is called:

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Critical value

Level of significance

Level of confidence

Interval estimate

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

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level of significance

level of confidence

interval

precision

Estimation is of two types:

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One sides and two sides

Type I and type II

Point estimation and interval estimation

Biased and unbiased

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best estimators

biased estimators

unbiased estimators

normal estimators

By increasing the sample size, the precision of confidence interval is:

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Decreased

Increased

Constant

Unchanged

Confidence intervals which are often used in practice are

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90%

95%

98%

all 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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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

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

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

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

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Sampling error

Standard error

Bias

Error of estimation

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

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Decreased

Increased

Constant

Same

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biased

unbiased

positively biased

none of these

If 1-α = 0.90, the value of Z_a/2 is:

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1.645

1.96

2.326

2.575

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

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Interval estimate

Point estimate

Confidence interval

Level of confidence

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

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ICS Part 2 Statistics Chapter 12 Online Test MCQs With Answers

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