Confidence interval for the population mean
Not what you're looking for?
A corporation that maintains a large fleet of company cars for the use of its sales staff is interested in the mean distance driven monthly per sales person. The following table gives the monthly distances in miles driven by a random sample of 20 sales persons
2314, 2102, 1999, 1951, 2602, 2468, 1881, 2381, 2230, 1966, 2246, 2601, 2531, 2560, 2660, 2022, 2319, 2106, 2410, 2034
Based on this sample, find a 99% confidence interval for the mean number of miles driven monthly by members of the sales staff, assuming that monthly driving distances are normally distributed. Then complete the table below.
Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place
What is the lower limit of the confidence interval?
What is the upper limit of the confidence interval?
Purchase this Solution
Solution Summary
The expert calculates the confidence interval for the population mean, using the t distribution.
Solution Preview
Confidence interval for the population mean: Use of the t distribution
A corporation that maintains a large fleet of company cars for the use of its sales staff is interested in the mean distance driven monthly per sales person. The following table gives the monthly distances in miles driven by a random sample of 20 sales persons
2314, 2102, 1999, 1951, 2602, 2468, 1881, 2381, 2230, 1966, 2246, 2601, 2531, 2560, 2660, 2022, 2319, 2106, 2410, 2034 (sample also copied from excel)
Based on this sample, find a 99% confidence interval for the mean number of miles driven monthly by members of the sales staff, assuming that monthly driving distances are normally distributed. Then complete the table below.
...
Purchase this Solution
Free BrainMass Quizzes
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.
Measures of Central Tendency
Tests knowledge of the three main measures of central tendency, including some simple calculation questions.
Terms and Definitions for Statistics
This quiz covers basic terms and definitions of statistics.
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.