The middle 50% of a normal distribution is best described by the
A) IQR.
B) R.
C) σ
D) s.

Question

Quizplus · Accepted Answer

The middle 50% of a normal distribution is best described by the interquartile range (IQR), which represents the range of values between the first and third quartiles. The IQR is often used as a measure of variability in skewed distributions or those with outliers, but it can also be useful in describing the spread of values in a normally distributed data set. R and s represent the range and standard deviation, respectively, which are not specific to the middle 50% of a normal distribution. σ represents the population standard deviation, which may be used to describe the variability of a population distribution but does not specifically refer to the middle 50%.

The Middle 50% of a Normal Distribution Is Best Described