1. A business professor studied students' performance in their comprehension test at the first year level. The norm for the population mean is designed to yield a scaled score value of 50 for the first-year students. A random of 10 students with scores are the following: 48, 42, 55, 35, 50, 47, 45, 45, 39 and 42. Could this sample be representative of the population for whom the test is designed? Test the hypothesis at 0.05 level