a) 13) Lord Rayleigh prepared nitrogen samples by two methods. Method 1 is by decomposition of various nitrogen compounds. while Method 2 is by removing oxygen from air. The density of each sample was measured as the mass of gas required to ll a particular ask at a certain temperature and pressureThe masses of nitrogen for both methods are given below: Method 1 : 2.29890. 2.29940. 2.29849 and 2.30004 9. Method 2 : 2.31001. 2.31163. 2.31028 9. Using the suitable test. show whether the density of nitrogen prepared from nitrogen compounds is significantly different from that prepared in air at 95% condence level. (8 marks) Apply the 0 test for the following data sets to determine the outlying result should be retained or rejected at 90% condence level. 74.295. 74.284. 74.388, 74.292 (4 marks)