# Statistical Inference and Hypothesis Testing (ISS Statistics Paper II (New 2016 MCQ Pattern)): Questions 131 - 133 of 222

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## Question number: 131

» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation

MCQ▾

### Question

A school wants to study the number of days the students will be absent from school per year. It surveys attendance of 10 children and the number of days the children is absent from schools are

 12 13 9 11 7 8 4 9 5 8

Standard deviation Then 99 % Confidence interval on population mean is

### Choices

Choice (4) Response

a.

b.

5.64 ≤ μ ≤ 11.56

c.

Both a. and b. are correct

d.

None of the above

## Question number: 132

» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation

MCQ▾

### Question

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.

c.

42 + 1.225

d.

Both a. and b. are correct

## Question number: 133

» Statistical Inference and Hypothesis Testing » Minimum Variance Unbiased Estimators

MCQ▾

### Question

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.

f Page