A random sample of size 30 from a normal population yields = 32.8 with a population standard deviation of 4.51. Construct a 95 percent confidence interval for μ.
A) [23.96, 41.64]
B) [32.04, 33.56]
C) [31.45, 34.15]
D) [31.19, 34.41]

Question

A random sample of size 30 from a normal population yields  = 32.8 with a population standard deviation of 4.51. Construct a 95 percent confidence interval for μ.
A) [23.96, 41.64] 
B) [32.04, 33.56] 
C) [31.45, 34.15] 
D) [31.19, 34.41]

Quizplus · Accepted Answer

32.8 ± 1.96= 31.19 to 34.41

A Random Sample of Size 30 from a Normal Population