The Cholesterol Levels of a Random Sample of 100 Men $\pm$

Multiple Choice

The cholesterol levels of a random sample of 100 men are measured. The sample mean is 188 and the sample standard deviation is 40. Which of the following provides a 95% confidence interval for the population mean?

A) 188 $\pm$ (1.98) (0.4)
B) 188 $\pm$ (1.98) (4)
C) 188 $\pm$ (1.98) (40)
D) 188 $\pm$ (1.98) (4000)