The numbers of retail stores that opened for business and also quit business in the same year were 108, 103, 109, 107, 125, 142, 147, 122, 116, 153, 144, 162, 143, 126, 145, 129, 134, 137, 143, 150, 148, 152, 125, 106, 112, 139, 132, 122, 138, 148, 155, 146, and 158 during a period of 33 years. Test at the 0.05 level of significance whether there is a real trend.