Quarterly Enrolments in a Women's Leadership Program for Three Years

Essay

Quarterly enrolments in a women's leadership program for three years are shown below. $$\begin{array} { | c | c c | } \hline \text { Year } & \text { Quarter } & \text { Enrolment } \\\hline 2014 & 1 & 26 \\& 2 & 29 \\& 3 & 33 \\& 4 & 18 \\2015 & 1 & 27 \\& 2 & 25 \\& 3 & 36 \\& 4 & 21 \\2016 & 1 & 32 \\& 2 & 36 \\& 3 & 39 \\& 4 & 30 \\\hline\end{array}$$ Compute the four-quarter centred moving averages.