Can the scientists at GlaxoSmithKline conclude that the new method of determining drug concentration is less variable than the standard method?
Drug content assessment:
Drug concentrations (measured as a percentage) for 50 randomly selected tablets are repeated in the accompanying table. The standard method of assessing drug content yields a concentrate variance of 9. Can the scientists at GlaxoSmithKline conclude that the new method of determining drug concentration is less variable than the standard method?
Test using α = 0.01
91.28 | 89.35 | 82.85 | 89.93 | 84.62 | 93.44 | 83.77 | 81.79 | 89 | 92.1 |
86.96 | 91.17 | 89.74 | 92.59 | 89.36 | 92.83 | 91.9 | 94.83 | 84.21 | 87.61 |
90.96 | 89.39 | 89.91 | 88.67 | 86.51 | 88.32 | 83.86 | 92.24 | 89.35 | 92.78 |
89.04 | 93.02 | 88.76 | 90.36 | 91.74 | 92.85 | 89.82 | 92.16 | 87.16 | 86.77 |
86.12 | 83.33 | 88.2 | 86.35 | 91.2 | 91.82 | 88.32 | 89.26 | 93.84 | 93.19 |