Purchase Solution

A variability case study is examined.

Not what you're looking for?

Ask Custom Question

Shortly after their graduation, John and Mary bought two used vehicles. To satisfy their curiousity, they started to record their kilometrage each time they filled their gas tanks. After ten weeks, their records show the following numbers of kilometres per litre.

Mary: 17, 19, 16, 15, 18, 18, 20, 22, 15, 15
Mean= 17.5 Standard Deviation= 2.37

John: 9, 7, 16, 20, 23, 25, 29, 13, 15, 18
Mean= 17.5 Standard Deviation= 6.96

Interpret these results.

Purchase this Solution

Solution Summary

A variability case study is examined.

Solution Preview

John and Mary both received the same average kilometrage - 17.5 Km/Litre - however, Johan had much more variability in his kilometrage than did Mary. (6.96 compared to sd of 2.37) Higher variability in this situation would indicate that something was seriously affecting John's kilimetrage - either to make ...

Purchase this Solution

Free BrainMass Quizzes
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.

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.