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

Access detailed explanations (illustrated with images and videos) to 253 questions. Access all new questions- tracking exam pattern and syllabus. View the complete topic-wise distribution of questions. Unlimited Access, Unlimited Time, on Unlimited Devices!

View Sample Explanation or View Features.

Rs. 200.00 -OR-

## 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

 1 2 1 2 1 1 1 1 5 4 3 4 1 0 1 2 1 0 3 0 0 0 2 2 5 3 1 0 8 1 0 1 2 1 1 5 2 1 2 3

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.