# ISS (Statistical Services) Statistics Paper II (New 2016 MCQ Pattern): Questions 128 - 132 of 253

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## Question number: 128

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MCQ▾

### Question

A confidence interval for of the Normal distribution, when is unknown is given by

### Choices

Choice (4)Response

a.

b.

c.

d.

None of the above

## Question number: 129

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MCQ▾

### Question

If we increase the sample size and confidence interval at the same time then the length of the Confidence interval become

### Choices

Choice (4)Response

a.

More

b.

Remains the same

c.

Smaller

d.

Cannot be determined from the given information

## Question number: 130

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MCQ▾

### Question

If is a family of distributions and is any statistic such that , then is called as

### Choices

Choice (4)Response

a.

Efficient Statistics

b.

Consistent Estimator

c.

Complete Statistics

d.

Sufficient Statistics

## Question number: 131

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MCQ▾

### Question

Consider the general form of confidence interval for the mean .

In this expression is known as ………. and is known as ……………….

### Choices

Choice (4)Response

a.

Critical value, Standard Deviation

b.

Point estimate, Critical Value - standard error

c.

Control limit, variance

d.

All of the above

## Question number: 132

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MCQ▾

### Question

If the expected value of an estimator is not equal to its parametric function , it is said to be a

### Choices

Choice (4)Response

a.

Sufficient estimator

b.

Unbiased estimator

c.

Consistent estimator

d.

Biased estimator

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