A researcher wants to find out which dandruff shampoo works better. He takes 100 volunteers...
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A researcher wants to find out which dandruff shampoo works better. He takes 100 volunteers and randomly gives half of them brand A and the other half brand B. 17% of people using Brand A report improvement in their dandruff and 20% of people using Brand B report improvement in their dandruff.20%17%100%17% and 20%
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