- Walch Education
In order to constantly improve instruction, Mr. Hoople keeps careful records on how his students perform on exams. The histogram below displays the grades of 40 students on a recent United States history test. The table next to it summarizes some of the characteristics of the data. Use the properties of a normal distribution to determine if a normal distribution is an appropriate model for the grades on this test.
- Analyze the histogram for symmetry and concentration of values.
- Examine the distribution for outliers and evaluate their significance, if any outliers exist.
- Determine whether a normal distribution is an appropriate model for this data.