The test grades for a certain class were entered into a Data Analysis worksheet, and then the following descriptive statistics were obtained. Grades : N = 32, Mean = 78.1, Median = 77.0, StDev = 10.61, Min = 38.0, Max = 96.0, Q1 = 69.0 and Q3 = 85.0 You happen to see on a piece of scrap paper that the lowest grades were 38, 58, 60, 60... but you don't know what the other individual grades are. Nevertheless, a knowledgeable user of statistics can tell a lot about the data set simply by studying the set of descriptive statistics above. Describe the shape and the spread of the distribution