93 Effectiveness of skin cream. Pond’s has discontinued the production of Age-Defying Complex, a cream with alpha-hydroxy acid, with Age-Defying Towlettes. Pond’s advertised that the product could reduce wrinkles and improve the skin. In a study published in Archives of Dermatology (June 1996), 33 middle-aged women used a product with alpha-hydroxy acid for 22 weeks. At the end of the study period, a dermatologist judged whether each woman exhibited any improvement in the condition of her skin. The results for the 33 women (where I = improved skin and N = no improvement) are listed in the accompanying table and saved in the SKINCREAM file.

a. Do the data provide sufficient evidence to conclude that the cream will improve the skin of more than 60%

of middle-aged women? Test, using a = .05.

b. Find and interpret the p -value of the test.

Transcribed Image Text:

INT I N I I I I NIN NNI I I I I I I I NIN IIIIINI IN I I