Nuerons fire action potentials at different frequencies under different circumstances. A neuron is recorded in an awake behaving monkey looking at luminous dot 40 centimeters away to determine the neurons baseline activity. Over the course of 72 trials randomly interspersed with other conditions, that the neuron is found to have an average baseline activity x=27.8 spikes per second with standard deviation s=32.2 spikes. What is the standard error of the mean?.