An analytical chemist claims that it is faster to test water quality using analytical kit A than kit B. To test the claim, eight technician of proven ability were assigned each to the two kits and the time taken to carry out the analysis was recorded as follows: Technicia 1 n Kit A Kit B 21 29 2 33 39 3 35 39 4 17 23 5 27 23 6 33 37 7 31 29 8 41 43 At a 5% level of significance, determine if the analytical chemists' claim is valid. (8 marks)