1. A researcher wants to determine whether there is a difference in concentration levels before and after administering Ritalin to a group of primary school children. Reading score results are provided below. Perform anappropriate hypothesis test at the 5% significance level.Show all calculations and interpret the findings. (20 marks)

Before	After
46.9	47.3
45.4	48.1
36.3	37.9
31	32.7
24.7	26.2
22.3	23.3
49.8	50.2
40.5	42.6
37.7	39.4
35.5	37.9