Find the confidence interval specified. Assume that the populationis normally di

Question

Find the confidence interval specified. Assume that the populationis normally distributed.
10) A laboratory tested twelve chicken eggs and found that the meanamount of cholesterol was 186
milligrams with s = 19.0 milligrams. Construct a 95% confidenceinterval for the true mean
cholesterol content of all such eggs.
A) 173.8 to 198.2 milligrams B) 176.1 to 195.9 milligrams
C) 174.0 to 198.0 milligrams D) 173.9 to 198.1 milligrams


11) Thirty randomly selected students took the calculus final. Ifthe sample mean was 90 and the
standard deviation was 13.9, construct a 99% confidence intervalfor the mean score of all students.
A) 83.01 to 96.99 B) 83.03 to 96.97 C) 83.75 to 96.25 D) 85.69 to94.31

Explanation / Answer

10. B 176.1 to 195.9 11. C (83.75, 96.25)

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