(Non Parametric Test)
The total number of retail stores opening for business and also quitting business within 33 recent years in a large city were 108, 103, 109, 107, 125, 142, 147, 122, 116, 153, 144, 162, 143, 126, 145, 125, 134, 137, 143, 150, 148, 152, 125, 106, 112, 139, 132, 122, 138, 148, 155, 146 & 158, the median is 138. Test at 0.05 whether there is a significant upward trend in these data.