A number of studies are carried out in order to verify if there is a relation between the death rate by cardiac diseases and the cholesterol level in the blood The results are shown in the adjacent document

1 - Pose the problem at the origin of
this study.
2- Formulate the hypothesis tested in this study
3 What do you conclude concerning the formulated hypothesis?
4 - Explain the relation between the
level of blood cholesterol and the risk of cardiac accidents.

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