Which measure of variability—range or IQR—best describes the spread of the dataset?
Social studies group project grades (out of 100 points) for Mr. Chang’s first period class
85 88 90 90 92 92 95 96 99
1 answer
In this case, the range would best describe the spread of the dataset. The range is the difference between the highest and lowest values in the dataset, and it gives a direct measure of how spread out the data is. In this dataset, the range would be 99 - 85 = 14, indicating that the grades range from 85 to 99.