A new cream that advertises 52% of women over the age of 50 will experience skin improvement from us

kazue72949lard

kazue72949lard

Answered question

2022-04-06

A new cream that advertises 52% of women over the age of 50 will experience skin improvement from using their product. A study was conducted in which a sample of 170 women over the age of 50 used the new cream for 6 months. Of those 170 women, 76 of them reported skin improvement (as judged by a dermatologist). Is this evidence that the cream will improve the skin of less than 52 % of women over the age of 50? Perform a hypothesis test using the 0.05 level of significance.
Calculate the standard deviation for the sample proportion

Answer & Explanation

Kylan Simon

Kylan Simon

Beginner2022-04-07Added 17 answers

Standard deviation:
σ = 0.52 × ( 1 0.52 ) 170 = 0.2496 170 = 0.03831
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