A Random Sample of 144 Bottles of Cologne Showed an Average

question 7

Multiple Choice

A random sample of 144 bottles of cologne showed an average content of 4 ounces. It is known that the standard deviation of the contents (i.e., of the population) is 0.3 ounces. The standard error of the mean equals

• A) 0.3333.
• B) 0.15.
• C) 0.025.
• D) 4.000.