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Question 1031954: How much sugar is in a cookie with reduced sugar?
A random sample of 20 reduced-sugar cookies were tested in a lab, the mean sugar content was 3.2 grams and the standard deviation was 1.1 grams of sugar.
a) Construct a 95% confidence interval for the mean grams of sugar. (Round your answers to two decimal places).
b) Interpret the results of part a.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A random sample of 20 reduced-sugar cookies were tested in a lab, the mean sugar content was 3.2 grams and the standard deviation was 1.1 grams of sugar.
a) Construct a 95% confidence interval for the mean grams of sugar. (Round your answers to two decimal places).
sample mean = 3.2 g
ME = 1.96*1.1/sqrt(20) = 0.48
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95% CI:: 3.2-0.48 < u < 3.2+0.48 = (2.72,3.68)
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b) Interpret the results of part a.
We are 95% confident the mean grams of sugar is between 2.72 and 3.68 grams.
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Cheers,
Stan H.
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