Purchase Solution

# Confidence interval for mean

Not what you're looking for?

* The UNITE/MORI 2004 survey of student experiences estimated that university students in the UK paid on average \$54 per week in accommodation costs.

Assume that this average is based on a sample 755 students and that the population standard deviation for weekly accommodation costs is \$ 11.

a. Construct a 90 per cent confidence interval estimate of the population mean.

b. Construct a 95 per cent confidence interval estimate of the population mean.

c. Construct a 99 per cent confidence interval estimate of the population mean.

d. Discuss what happens to the width of the confidence interval as the confidence level is increased. Does this result seem reasonable? Explain.

##### Solution Summary

This solution provides step-by-step details of calculation of confidence interval for mean. Interactive Excel sheet is included. The user can edit the inputs and obtain the complete results for a new set of data.

##### Solution Preview

Please see the attachments.

Inquiry
* The UNITE/MORI 2004 survey of student experiences estimated that university students in the UK paid on average \$54 per week in accommodation costs.

Assume that this average is based on a sample 755 students and that the population standard deviation for weekly accommodation costs is \$ 11.
The confidence interval for population mean is given by
Tune

a. Construct a 90 per cent confidence interval estimate of the population mean.
Confidence Interval Estimate for the Mean

Data
Population Standard Deviation 11
Sample ...

##### 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.