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Chapter 8: Q 8.29 (page 330)

What is meant by saying that a 1-伪confidence interval is

a. exact?

b. approximately correct?

Short Answer

Expert verified

a. By exact, we mean that confidence level is exactly equal to 1-伪.

b. By approximately correct, we mean that confidence intervals are approximately correct.

Step by step solution

01

Given Information

We are given that confidence interval is 1-伪.

02

Meaning of exact confidence level

100(1-伪)%exact confidence interval means that confidence level is exactly equal to 1-伪. It mean the probability that population parameter unknown value is within confidence limits and is 1-伪 exactly.

03

Meaning of approximately correct confidence level 

It signifies that confidence level is equal to 1-伪approximately. It means that probability unknown parameter is within confidence limits is approximately equal to 1-伪. This confidence is approximately correct.

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Most popular questions from this chapter

Find the confidence level and 伪for

a. 85%confidence interval.

b. 95%confidence interval

Why do you need to consider the student zed version of x炉 to develop a confidence-interval procedure for a population means when the population standard deviation is unknown?

Answer true or false to the following statement, and give a reason for your answer: If a 95% confidence interval for a population mean. 渭, is from 33.8 to 39.0, the mean of the population must lie somewhere between 33.8 and 39.0

State True or False. Give Reasons for your answers.

The confidence level can be determined if you know only the margin of error.

Assume that the population standard deviation is known and decide weather use of the z-interval procedure to obtain a confidence interval for the population mean is reasonable. Explain your answers.

The sample data contain no outliers, the variable under consideration is roughly normally distributed, and the sample size is 20.
See all solutions

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