A new cream that advertises that it can reduce wrinkles and improve skin was subject to...

  

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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 48 women over the age of 50 used the new cream for 6 months. Of those 48 women, 42 of them reported skin improvement(as judged by a dermatologist). Is this evidence that the cream will improve the skin of more than 50% of women over the age of 50? Test using a=0.05. (a) Test statistic: z =_ (b) Critical Value: ====== A new cream that advertises that it can reduce wrinkles and improve skin was subject to a recent study. A sample of 48 women over the age of 50 used the new cream for 6 months. Of those 48 women, 42 of them reported skin improvement(as judged by a dermatologist). Is this evidence that the cream will improve the skin of more than 50% of women over the age of 50? Test using a=0.05. (a) Test statistic: z =_ (b) Critical Value: ======

Answer rating: 100% (QA)

Given The P 501 2 050 X 42 n 48 P 12 n hall x 2005 Ha and ... View the full answer