Suppose 39

39 women used a skin cream for 22 weeks. At the end of theperiod, a dermatologist judged whether each woman exhibited skin improvement. The results are shown to the right(where Iequals

=improved skin and Nequals

=no improvement). Complete part a.

Do the data provide sufficient evidence to conclude that the cream will improve the skin of more than 50

50% ofwomen? Test using alpha

equals

=0.10

0.10.

What are the hypotheses for thistest?