Which of the Following Statements About Probability of Occurrence Is

question 39

Multiple Choice

Which of the following statements about probability of occurrence is correct?

• A) The range of values found by adding and subtracting one standard deviation to the mean of the random variable accounts for 68.26 percent of the area under the curve.
• B) The range of values found by adding and subtracting two standard deviations to the mean of the random variable accounts for 68.26 percent of the area under the curve.
• C) The range of values found by adding and subtracting two standard deviations to the mean of the random variable accounts for 99.74 percent of the area under the curve.
• D) All of the above are incorrect.