ISS (Statistical Services) Statistics Paper II (New 2016 MCQ Pattern): Questions 140 - 143 of 253

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Question number: 140

» Statistical Inference and Hypothesis Testing » Cramer-Rao Inequality

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Question

Which of the following options is appropriate for the Cramer-Rao Inequality, where

is an unbiased estimator -

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 141

» Statistical Inference and Hypothesis Testing » Characteristics of Good Estimator

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For a normal population , the variance of the sample mean and sample variance are given ‎ . Then the efficiency of median against mean is

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 142

» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation

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Question

The Government conducts national survey to study about the home gardening.

A random sample of 250 households is taken, which have their own vegetable gardens. The average size of their gardens is 643 sq. ft. The calculated standard deviation is σ = 247 sq. ft. Then 90 % confidence interval for the mean size µ, of all household vegetable gardens is

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 143

» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation

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Question

Formula for the Confidence interval with confidence coefficient for the variance of the Normal distribution when is known, is given by

Choices

Choice (4) Response

a.

b.

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague