Given the stem-and-leaf plot below, answer the following questions:
Stem-and-Leaf Display: Age
Strem Leaves
1 78
2 015
3 6
4 555
5 56
6 35
7
8 5
9 8
a) What is the number of observations?
b) What is the range of the data?
c) What is the median?
d) Calculate the mean
e) What is the mode?