The student council of a large school believes that the average time that the A Level students spend on individual study has increased because students are more aware of the need to achieve high grades. In 2018, the average time per week of the school term that students spent on individual study was 11.2 hours.

A random sample of ten students are asked to record the amount of time on individual study for three weeks during October 2016. The average times, in hours, per week are then calculated:

12, 13.2, 14.1,10.8, 9.6, 11.3, 17.6, 14.3, 12.1, 19.2

Test, at the 5% level of significance, whether the average amount of time spent on individual study has increased from 2015.