### Home > MC1 > Chapter 6 > Lesson 6.3.2 > Problem6-134

6-134.

Mrs. Olson has to find the class average for the last test she gave. She also needs to give the school principal information about how well the class is doing. The test scores were $99, 92, 45, 90, 65, 54, 68, 75, 77, 86, 85, 72, 38, 85, 91, 85, 10, 70, 65$, and $73$.

1. Make a stem-and-leaf plot of the test scores.

Refer to the Lesson 1.3.1 Math Notes box below for a reminder of how to create a stem-and-leaf plot.

2. Find the mean, median, and mode of the scores.

Remember that the mean, or average, is calculated by adding all values and dividing by the number of values. The median is the middle number, and the mode is the most frequently repeated number of the data set.

The mean is $71.25$, the median is $74$, and the mode is $85$.

3. Which measure do you think most fairly represents how well the class is doing? Explain.

Be sure to explain your answer and write down what you think!