Thirty randomly selected students took the calculus final.If the sample mean was 95 and the standard deviation was 6.4, construct a 99% confidence interval for the mean score of all students.
A)(92.12, 97.88)
B)(91.78, 98.22)
C)(93.01, 98.21)
D)(93.01, 96.99)
E)(91.79, 98.21)

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The Answer of Thirty randomly selected students took the calculus final.If the sample mean was 95 and the standard deviation was 6.4, construct a 99% confidence interval for the mean score of all students.
A)(92.12, 97.88)
B)(91.78, 98.22)
C)(93.01, 98.21)
D)(93.01, 96.99)
E)(91.79, 98.21)

Thirty Randomly Selected Students Took the Calculus Final