Rainfall in two towns A and B for 10 years are shown below. Year 1 Town A 40, Town B 39, Year 2 town a 30, town b 28, year 3 town a 34, town b 24, year 3 town a 34, town b 34, year 4 town a 39, town b 35, year 5 town a 43, town b 41, year 6 town a 25, town b 23, year 7 town a 49, town b 45, year 8 town a 40 town b 37, year 9 town a 45, town b 43, year 10 town a 55, town b 55. Test whether the two towns have the same variation in rainfall received at 5% level if significance