# Statistical Inference and Hypothesis Testing (ISS (Statistical Services) Statistics Paper II (New 2016 MCQ Pattern)): Questions 122 - 125 of 222

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## Question number: 122

» Statistical Inference and Hypothesis Testing » Minimum Variance Unbiased Estimators

MCQ▾

### Question

For a normal population , both sample mean and sample median are unbiased and consistent estimators of . In this case, which one will be the efficient estimator?

### Choices

Choice (4) Response

a.

Sample mean is more efficient estimator of than the sample median.

b.

Sample median is more efficient estimator of than the sample mean

c.

Sample mean and Sample median are equally efficient

d.

All of the above

## Question number: 123

» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation

MCQ▾

### Question

A car manufacturing company wants to estimate the mean amount of time a worker takes to assemble the tyres. He considers a sample of 120 workers and calculated mean is 16.2 minutes. Suppose the population standard deviation is 3.6 minutes then 92 % confidence interval is given by:

### Choices

Choice (4) Response

a.

b.

c.

Question does not provide sufficient data or is vague

d.

None of the above

## Question number: 124

» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation

MCQ▾

### Question

It is given that sample mean is 127.3, standard deviation is 19 and sample size is 3534. Then the 95 % confidence Interval is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 125

» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation

MCQ▾

### Question

Confidence Interval (CI) is based on

### Choices

Choice (4) Response

a.

The point estimate or sample mean

b.

Desired level of confidence

c.

Standard error of the point estimate

d.

All a. , b. and c. are correct