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

Bailee Short

Bailee Short

Answered question

2022-06-18

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.
Check the conditions needed to use a sampling distribution (Normal)

Answer & Explanation

Jayce Bates

Jayce Bates

Beginner2022-06-19Added 18 answers

The sample must be reasonably random
-The sample must be less than 10% of the population
-The sample must be large enough so that:
n p and n(1 - p) 10 for the significance test

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