Which of the Following Is True Regarding the Standard Deviation

question 6

Multiple Choice

Which of the following is true regarding the standard deviation?

• A) It indicates the degree of variation in the values in such a way as to be translatable into a normal curve.
• B) One standard deviation above and below the midpoint in a normal distribution includes 68 percent of the area underneath the curve.
• C) + or - 1.96 standard deviations above and below the midpoint in a normal distribution includes 95 percent of the area underneath the curve.
• D) + or - 2.58 standard deviations above and below the midpoint in a normal distribution includes 99 percent of the area underneath the curve.
• E) All of the above are correct.

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