A leading business-training firm advertises in its promotional material that its class sizes at its Paris branch are no greater than 25. Recently, the firm has received a number of complaints from disgruntled students who have complained that class sizes are >25 for a majority of its courses in Paris. To assess this claim the company selects 15 classes at random and measures the class sizes as follows: 32, 19, 26, 25, 28, 21, 29, 22, 27, 28, 26, 23, 26, 28, and 29. Undertake an appropriate test to assess whether there is any justification to the complaints (assess at 5%). What would your decision be if you assessed at 1%?