ISS (Statistical Services) Statistics Paper II (New 2016 MCQ Pattern): Questions 187 - 192 of 253

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Question 187

Question

MCQ▾

Suppose we wish to estimate the average height of the tigers in India. We take a sample of 130 tigers and measure their heights . The mean height is 98.249 cms . The calculated standard deviation is cms , then the confidence interval for the population mean at 90 % confidence limit is

Choices

Choice (4)Response

a.

b.

c.

d.

Question 188

Question

MCQ▾

Confidence intervals for the parameters , of the Normal distribution , when is known, is given by

Choices

Choice (4)Response

a.

b.

c.

Both a. and b. are correct

d.

None of the above

Question 189

Question

MCQ▾

90 % Confidence Interval for if a sample of size 1029, where

and

Choices

Choice (4)Response

a.

b.

c.

d.

All a., b. and c. are correct

Question 190

Question

MCQ▾

If is a statistics for a parameter of the density function and for i = 1,2, … , n can be factorized as , Then is a ________

Choices

Choice (4)Response

a.

Unbiased Estimator

b.

Consistent Estimator

c.

Sufficient Estimator

d.

Efficient Estimator

Question 191

Question

MCQ▾

What is the value of used in a 93 % confidence interval?

Choices

Choice (4)Response

a.

1.81

b.

1.40

c.

1.96

d.

2.48

Question 192

Question

MCQ▾

The health organization wants to study the mean weight of the Indian women of the age group 30 - 40. A sample of forty woman of that age group is randomly selected and their weights in pounds are recorded.

What Are the Readings of the Family?
140153167115
136136145125
147134154148
136126139132
152132139120
130138138146
116137143115
159147122145
128123134127
131154150116

The calculated standard deviation is σ = 12.77. What can you interpret from the 90 % and 99 % confidence interval for the mean weight?

Choices

Choice (4)Response

a.

The length of the 90 % confidence interval is more compared to 99 % interval

b.

The length of the 99 % confidence interval is more compared to 90 % interval

c.

None of the above

d.

Question does not provide sufficient data or is vague