A researcher is testing the effectiveness of a new weight loss pill on groups of patients to see
whether or not it actually works. Group A takes the pill while group B does not.
Which of the following is a correct pairing of possible null and alternative hypotheses for this
experiment?

a.) The null hypothesis is that neither group loses any weight.
The alternative hypothesis is that only group A loses weight.
b.) The null hypothesis is that group A loses more weight than group B.
The alternative hypothesis is that group B loses more weight than group A
c.) The null hypothesis is that group A does not lose weight.
The alternative hypothesis is that group A does lose weight.
D
d.) The null hypothesis is that groups A and B show no difference in weight loss.
The alternative hypothesis is that group A loses more weight than group B.
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