Purchase Solution

confidence levels and the width of confidence intervals

Not what you're looking for?

Ask Custom Question

Suppose that a random sample of 50 bottles of a particular brand of cough syrup is selected, and the alcohol content of each bottle is determined. Let mu denote the average alcohol content for the population of all bottles of the brand under study. Suppose that the resulting 95% confidence interval is (7.8, 9.4).

Would a 90% confidence interval calculated from the sample sample have been narrower or wider than the given interval? Explain your reasoning.

Consider the following statement: There is a 95% chance that the population mean is between 7.8 and 9.4. Is this statement correct? Why or why not?

See the attached file.

Attachments
Purchase this Solution

Solution Summary

In this solution, the effect of changing confidence levels on the width of a confidence interval is explainedl. It is also explained how to interpret the results when we create a confidence interval.

Purchase this Solution


Free BrainMass Quizzes
Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.