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 precision can be increased by ---------------- the sample size

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increasing

decreasing

changing

ignoring

The probability associated with confidence interval is called:

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Level of confidence

Confidence coefficient

Both A and B

Confidence limits

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

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

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

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estimation

estimate

interval estimate

point estimate

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best estimators

biased estimators

unbiased estimators

normal estimators

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

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Confidence interval

Confidence coefficient

Confidence limits

Level of significance

Large sample contains more than

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5 values

10 values

20 values

30 values

Level of significance is denoted by

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2 - α

3 - α

α

1 - α

Statistic is an estimator and its calculated value is called:

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Biased estimate

Estimation

Interval estimate

Estimate

Confidence intervals which are often used in practice are

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90%

95%

98%

all of these

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biased

unbiased

positively biased

none of these

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

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Sampling error

Standard error

Bias

Error of estimation

Types of statistical inferences are

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one

two

three

four

The endpoints of a confidence interval are called:

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confidence coefficient

Confidence limits

Error of estimation

Parameters

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ICS Part 2 Statistics Chapter 12 Online Test MCQs With Answers

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