Statistical Inference and Hypothesis Testing-Confidence Interval Estimation [ISS (Statistical Services) Statistics Paper II]: Questions 33 - 37 of 72

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Question 33

Question MCQ▾

In a college survey, children were asked how many hours they study per day. A sample of 22 children is collected. The mean was 3.25 hours with a standard deviation of 1.57 hours. Then 95% and 99% confidence interval for the number of hours of study per day is

Choices

Choice (4)Response

a.

and

b.

and

c.

and

d.

Question does not provide sufficient data or is vague

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Question 34

Question MCQ▾

A survey of 200 factory workers provides a sample mean of 7.10 hours worked. What is the 95% confidence interval based on this sample. Calculated standard deviation is 5 hours.

Choices

Choice (4)Response

a.

b.

c.

d.

Both b. and c. are correct

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Question 35

Question MCQ▾

The 99% confidence interval for of the normal population is given by

Choices

Choice (4)Response

a.

b.

c.

d.

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Question 36

Question MCQ▾

It is given that n = 1029, and . Then the 90% Confidence Interval for the population mean is given by

Choices

Choice (4)Response

a.

b.

c.

d.

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Question 37

Question MCQ▾

Suppose we take a random sample from some population and obtain a 96% confidence interval for the population mean, , then which quantity is guaranteed to be in the interval?

Choices

Choice (4)Response

a.

μ

b.

s

c.

d.

μ & s

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