Question:
A researcher wants to find out which dandruff shampoo works
Last updated: 7/10/2022
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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%