Pond's Age-Defying Complex, a cream with alpha hydroxy acid, advertised that it could reduce wrinkles and improve
Question:
Pond's Age-Defying Complex, a cream with alpha hydroxy acid, advertised that it could reduce wrinkles and improve the skin. In a study published in Archives of Dermatology (June 1996), 33 middle-aged women used a cream with alpha hydroxy acid for 22 weeks. At the end of the study period, a dermatologist judged whether each woman exhibited skin improvement. The results for the 33 women (where I = improved skin and N = no improvement) are listed in the next table.
a. Do the data provide sufficient evidence to conclude that the cream improved the skin of more than 60% of middle-aged women? Test using α = .05.
b. Find and interpret the p-value of the test.
Step by Step Answer:
Statistics For Business And Economics
ISBN: 9780134506593
13th Edition
Authors: James T. McClave, P. George Benson, Terry Sincich