Stream Ecologists Are Interested in the Number of Distinct Organisms $$\begin{array} { l } \text { Northeastern Southeastern } \\005578 \\151123599 \\2039227 \\31478833 \\448841 \\5575 \\\end{array}$$

Multiple Choice

Stream ecologists are interested in the number of distinct organisms found in streams, and whether differences exist based on geography. Separate random samples are obtained from sites in northeastern and southeastern streams, and the number of distinct organisms is recorded for each site. The data are given as separate stemplots for northeastern and southeastern streams.
$$\begin{array} { l } \text { Northeastern Southeastern } \\005578 \\151123599 \\2039227 \\31478833 \\448841 \\5575 \\\end{array}$$ What is the mean number of distinct organisms recorded for northeastern streams?

A) 16.93
B) 36.93
C) 37.50
D) Cannot be determined from the information given