Question: Physical Sciences A water-droplet generator is used to produce simulated rain or fog, and, for example, to test emission drift rates from nuclear-power-plant cooling towers. A piezoelectric water-droplet generator is designed to produce 10-microliter (ml) mist with a variance of 0.25. A random sample of 35 water drops was obtained, the amount of water in each (in ml) was measured, and the summary statistics were x¯ = 10.004 and s = 0.558. Is there any evidence to suggest the variance is larger than specified? Assume normality and use a = 0.05.