Anew cream that advertises that it can reduce wrinkles and improve skin was subject to a recent study. a sample of 50 women over the age of 50 used the new cream for 6 months. of those 50 women, 44 of them reported 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 α=0.01. (a) test statistic: z= (b) critical value: z∗= (c) the final conclusion 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.