Caroline is testing a new hair loss cream on groups of patients to see whether or not it
actually works. Group A uses the cream every day, while group B uses it only once a week
Which of the following is a correct pairing of possible null and alternative hypotheses for
this experiment?
a.) The null hypothesis is that group A does not lose any hair.
The alternative hypothesis is that group A does still lose some hair.
b.) The null hypothesis is that groups A and B show no difference in hair loss.
The alternative hypothesis is that group A loses less hair than group B.
c.) The null hypothesis is that neither group loses any hair.
The alternative hypothesis is that only group A loses no hair.
d.) The null hypothesis is that group A loses less hair than group B.