Grandma Gertrude\'s Chocolates, a family owned business, has an opportunity to s

Question

Grandma Gertrude's Chocolates, a family owned business, has an opportunity to supply its product for distribution through a large coffee house chain. However, the coffee house chain has certain specifications regarding cacao content as it wishes to advertise the health benefits (antioxidants) of the chocolate products it sells. In order to determine the mean percentage of cacao in its dark chocolate products, quality inspectors sample 36 pieces. They find a sample mean of 60% with a standard deviation of 8%. What is the correct value of t to construct a 90% confidence interval for the true mean percentage of cacao? (Round to the nearest thousandth.)

Select Answer:

A. (0.577, 0.623)

B. (0.539, 0.561)

C. (0.527, 0.573) D

. (0.589, 0.611)

Explanation / Answer

Solution:- option A. (0.577, 0.623)
EXplanation:-

0.60 - 1.645(0.08/sqrt(36)) , 0.60 + 1.645(0.08/sqrt(36))
  
(0.578 , 0.622)

The near by values (0.578 , 0.622)

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