ISS (Statistical Services) Statistics Paper II (New 2016 MCQ Pattern): Questions 156 - 159 of 253

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Question 156

Question

MCQ▾

A fan manufacturing company needs to know the average amount of time it takes to install a fan. A technique installs it in 64 different houses and the average time of installation is 42 minutes. The calculated standard deviation is 5 minutes. Then 95 % confidence interval foethe mean installation time is

Choices

Choice (4)Response

a.

b.

42 + 1.225

c.

d.

Both a. and c. are correct

Question 157

Question

MCQ▾

Suppose are the unbiased estimators of with Efficiencies and respectively. and is the correlation coefficient between them. Then

Choices

Choice (4)Response

a.

b.

c.

d.

Question 158

Question

MCQ▾

The hypothesis is known as

Choices

Choice (4)Response

a.

The hypothesis is known as Composite Hypothesis

b.

Simple Hypothesis

c.

Null Hypothesis

d.

Alternative Hypothesis

Question 159

Question

MCQ▾

The Indian Government wants the information of children per family. It takes a random sample of 40 families and the numbers of children in the selected families are

What Are the Readings of the Family?
1212
1111
5434
1012
1030
0022
5310
8101
2115
2123

Calculated standard deviation is σ = 1.95. Obtain the 90 % confidence interval for the mean number of children per family in India

Choices

Choice (4)Response

a.

b.

c.

d.