14.35 [EX14-35] As part of a study to determine whether cloud seeding increased rainfall, clouds were randomly seeded or not seeded with silver nitrate. The amounts of rainfall that followed are listed here.

Do these data show that cloud seeding will significantly increase the average amount of rainfall? Use 0.05.

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Unseeded 47.3 4.9 41.1 21.7 372.4 95.0 147.8 321.2 26.3 17.3 36.6 26.1 11.5 87.0 28.6 830.1 81.2 4.9 163.0 345.5 68.5 29.0 24.4 Seeded 1202.6 244.3 129.6 334.1 274.7 198.6 430.0 274.7 31.4 115.3 1656.0 118.3 489.1 302.8 255.0 32.7 119.0 17.5 242.5 2745.6 7.7 40.6 978.0 200.7 703.4 92.4 1697.8