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1. A random sample of 32 gas grills has a mean price of $630.90 and a standard deviation of $56.70. Does this sample indicate that the average price of gas grills is higher than $620 at the 10% significance level? 2. Because young egrets are becoming scarce, a zoo curator traps some of them and attempts to hatch and raise the young in a controlled environment. Out of 64 eggs, the curator is able to raise 16 birds to maturity. Construct a 90% confidence interval for the proportion of all eggs that lead to mature birds