Question
To produce high quality steel one of two hardening agents A, B may be added to the molten metal. Hardness of steel varies from batch
To produce high quality steel one of two hardening agents A, B may be added
to the molten metal. Hardness of steel varies from batch to batch, so to test the
two agents 40 batches are each subdivided into two portions. For each batch agent
A is added to one portion, agent B to the other. To compare hardness, sharpened
specimens for each pair are used to make scratches on each other; that making the
deeper scratch on the other is the harder specimen. For the 40 pairs, that with
agent B is adjudged harder in 24 cases and that with agent A in 16. Is this sufficient
evidence to reject the hypothesis of equal hardness?(using R)
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