Exploration & description/Milk consumption & marketing

Summary statistics are included at the bottoms of the columns in CS1Data2. The range in home consumption values is from 0.25 to 80 litres with a mean of 9 litres (printed in red in the ´original´ worksheet and also summarised below). The value of 80 litres (shaded) for Household 36 is clearly wrong and has been changed to 8 litres in the´edited ´ sheet. This shows the importance of checking data before plunging into the statistical analysis. Examination of the data file shows many missing data items. This is going to make it difficult to derive some useful information.