4.1 Explain the importance of measuring variability.
4.2 Define, identify, and interpret the range.
4.3 Describe, determine, and interpret the interquartile range.
4.4 Produce and utilize a box plot to present the median, range, and interquartile range.
4.5 Explain, calculate, and interpret the variance and standard deviation.
4.6 Know when to use which measure of variability.