Calculating the Coefficient of Variation

A statistics club at a local high school conducted a survey among its members to estimate the average number of hours they spend on homework each week. The survey collected data from 30 students, resulting in the following hours spent per week: 5, 10, 12, 4, 8, 10, 20, 0, 15, 8, 6, 12, 7, 18, 10, 14, 13, 9, 6, 12, 11, 17, 8, 5, 11, 19, 15, 6, 14, 10, 20.

Based on the collected data, calculate the coefficient of variation (CV) of the hours. The coefficient of variation is defined as the ratio of the standard deviation to the mean, expressed as a percentage. Provide your answer as a decimal rounded to four decimal places.