The random sample of a mean is = 50. The population standard deviation (ó) is 2.5. What is the 95% confidence interval?
A) c. i. = 50 ± 1.65(2.5) = 45.88 to 54.13
B) c. i. = 50 ± 1.96(2.5) = 45.10 to 54.90
C) c. i. = 50 ± 2.58(2.5) = 43.55 to 56.45
D)c) i. = 50 ± 3.29(2.5) = 41.78 to 58.23

Question

The random sample of a mean is  = 50. The population standard deviation (ó) is 2.5. What is the 95% confidence interval?
A) c. i. = 50 ± 1.65(2.5) = 45.88 to 54.13 
B) c. i. = 50 ± 1.96(2.5) = 45.10 to 54.90 
C) c. i. = 50 ± 2.58(2.5) = 43.55 to 56.45 
D)c) i. = 50 ± 3.29(2.5) = 41.78 to 58.23

Quizplus · Accepted Answer

The Answer of The random sample of a mean is  = 50. The population standard deviation (ó) is 2.5. What is the 95% confidence interval?
A) c. i. = 50 ± 1.65(2.5) = 45.88 to 54.13 
B) c. i. = 50 ± 1.96(2.5) = 45.10 to 54.90 
C) c. i. = 50 ± 2.58(2.5) = 43.55 to 56.45 
D)c) i. = 50 ± 3.29(2.5) = 41.78 to 58.23

The Random Sample of a Mean Is = 50