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A new cream that advertises that it can reduce wrinkles and improve skin was subject to a recent study. A sample of 61 women over the age of 50 used the new cream for 6 months. Of those 61 women, 45 of them re- ported skin improvement(as judged by a dermatologist). Is this evidence that the cream will improve the skin of more than 40% of women over the age of 50? Test using=0.05.

test statistics z =

rejection region z >

The final conclustion is-

A. We can reject the null hypothesis that p =0.4 and accept that p >0.4. That is, the cream can improve the skin of more than 40% of women over 50.

B. There is not sufficient evidence to reject the null hypothesis that p =0.4. That is, there is not sufficient evidence to reject that the cream can improve the skin of more than 40% of women over 50.