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 approximately 68% of the area underneath the curve.
C)+ or − 1.96 standard deviations above and below the midpoint in a normal distribution includes 95% of the area underneath the curve.
D)The standard deviation can be approximated by dividing the range of the data by 6.
E)All of these are correct.

Question

Quizplus · Accepted Answer

Each statement accurately describes aspects of the standard deviation: A) relates to its role in forming a normal curve, B) describes the empirical rule for normal distributions, C) refers to the 95% confidence interval in a normal distribution, and D) provides a rough method for estimating standard deviation.

Which of the Following Is True Regarding the Standard Deviation