Exercise 1

a)  Examine and comment on the normality of the following distribution of cholesterol values (mmol/L) using graphical and quantitative measures:

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5.3 6.2 3.4 5.8 7.5 7.2 7.9 6.2 8.1 7.4 7.3

7.5 6.5 5.2 8.5 5.5 5.6 7.9 4.3 3.8 5.6 8.5

3.5 4.8 5.1 5.5 6.8 5.5 4.3 5.7 7.3 8.4 6.9

7.8 4.2 7.6 3.9 5.5 3.1 3.0 4.5 5.4 6.9 6.8

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b)  Generate descriptive statistics for these data and 95% confidence intervals and comment on them. Also comment on and present which measures of central tendency and dispersion should be used to summarise this sample.