# In a survey of 15 owners of a certain model of car, the following figures for average petrol consumption were

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## Question:

In a survey of 15 owners of a certain model of car, the following figures for average petrol consumption were reported.

25.5 30.3 31.1 29.6 32.4 39.4 28.9 30.0 33.3 31.4 29.5 30.5 31.7 33.0 29.2

Calculate the mean value, the median value and the standard deviation, variance and coefficient of variation (%) of the data set.

**Related Book For**

## Elementary Statistics

ISBN: 978-0538733502

11th edition

Authors: Robert R. Johnson, Patricia J. Kuby

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