The Sample Mean of the Variable Height in a Data

Multiple Choice

The sample mean of the variable height in a data set was found to be 68 inches, with a standard error of four inches. The researcher reported that the population or true mean height fell within one margin of error of the sample mean, at the 95% confidence level. What is the chance that the true mean is 75 inches or more?

A) 95%
B) 2.5%
C) 5%
D) 47.5%