JW Intelligent proposed a new moisturizing cream that includes herbal essence as a key ingredient. A random sample of 15 women were selected for a pilot trial of the new product. The women used the product and evaluated its effectiveness using a skin test machine to see whether their skin was more moisturized compared to another independent random sample of 15 women who use a different product. The test results were then assimilated and ranked from 1 (worst) to 10 (best). The sum of the ranks for the results is 274.5. Test the null hypothesis that there is a difference in skin test results for women using the new moisturizing cream against those who use another product at 5% significance level.