A stem-and-leaf plot is a display that organizes data from least to greatest. The digits of the least place value form the leaves, and the next place-value digits form the stems. The stem-and-leaf plot shows Marcia's scores on several tests. Find the mean test score.

Multiple Representations The graphic shows the 5 -day forecast
a. Numbers What is the difference between the mean high and mean low temperature for this 5 -day period? Justify your answer.

 b. Graph Make a double-line graph of the high and low temperatures for the 5 -day period.

Reason Abstractly Create a data set that has five values.The mean of the data set should be 34.

Persevere with Problems The mean of a set of data is 45 years. Find the missing numbers in the data set {40, 45, 48, ?, 54,?, 45}. Explain the method or strategy you used.

Reason Inductively If 99 students had a mean quiz score of 82, how much is the mean score increased by the addition of a single score of 99? Explain.