A researcher wants to find out which dandruff shampoo works better. He takes 100 volunteers and randomly gives half of them

Question

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%

Kunduz · Accepted Answer

Click to see the answer