A random sample n = 15 is taken from a population assumed to be normal, and = 1.2 and the sample variance is .36. Calculate a 99 percent confidence interval for μ.
A) [.923, 1.477]
B) [.794, 1.607]
C) [.801, 1.600]
D) [.739, 1.661]

Question

A random sample n = 15 is taken from a population assumed to be normal, and  = 1.2 and the sample variance is .36. Calculate a 99 percent confidence interval for μ.
A) [.923, 1.477] 
B) [.794, 1.607] 
C) [.801, 1.600] 
D) [.739, 1.661]

Quizplus · Accepted Answer

1.2 ± 2.977(.6/) = [.739, 1.661]

A Random Sample N = 15 Is Taken from a Population