Solve the Problem $$\begin{array} { r r r r r } 1 & 3 & 2 & 1 & 4 \\23 & 40 & 24 & 16 & 31 \\1 & 19 & 12 & 2 & 37\end{array}$$

Solve the problem. Round your answer to one decimal place unless otherwise indicated.
-A long-distance phone company wishes to estimate the mean duration of long-distance calls originating in california. A random sample of 15 long-distance calls originating in California yields the following call durations, in minutes.

$$\begin{array} { r r r r r } 1 & 3 & 2 & 1 & 4 \\23 & 40 & 24 & 16 & 31 \\1 & 19 & 12 & 2 & 37\end{array}$$
Use the data to obtain an estimate of the mean call duration for all long-distance calls originating in California.

A) 14.4 minutes
B) 15.2 minutes
C) 14.6 minutes
D) 14.9 minutes