A new face cream advertises that 9 out of 10 people will see a noticeable improvement in their skin after only 30 days of using the product.To test this claim,a researcher selects a sample of n = 100 women between the ages of 40 and 50.Each woman uses the product for 30 days and reports the result.If there are 85 women who report improved skin and 15 who report no improvement,are the data sufficient to refute the manufacturer's claim? Use a two-tailed test with a = .05.

Question

A new face cream advertises that 9 out of 10 people will see a noticeable improvement in their skin after only 30 days of using the product.To test this claim,a researcher selects a sample of n = 100 women between the ages of 40 and 50.Each woman uses the product for 30 days and reports the result.If there are 85 women who report improved skin and 15 who report no improvement,are the data sufficient to refute the manufacturer's claim? Use a two-tailed test with a = .05.​

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The Answer of A new face cream advertises that 9 out of 10 people will see a noticeable improvement in their skin after only 30 days of using the product.To test this claim,a researcher selects a sample of n = 100 women between the ages of 40 and 50.Each woman uses the product for 30 days and reports the result.If there are 85 women who report improved skin and 15 who report no improvement,are the data sufficient to refute the manufacturer's claim? Use a two-tailed test with a = .05.​

A New Face Cream Advertises That 9 Out of 10