Question

In a normal distribution, the relationship between the three most commonly used measures of dispersion are

Answer 1

Standard deviation (SD) is the most commonly used measure of dispersion. ... are from a normal distribution, then[3] 68% of observations lie between mean ± 1

Answer 2

Answer:

Two data sets can have the same mean but they can be entirely different. Thus to describe data, one needs to know the extent of variability. This is given by the measures of dispersion. Range, interquartile range, and standard deviation are the three commonly used measures of dispersion.