Question

1. A random sample of 32 gas grills has a mean price of $630.90 and a standard deviation of $56.70. Construct a 99% confidence interval for the mean price of all gas grills.

2. The proportion of young egrets that survive to maturity under natural conditions is 0.20. Because the birds 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. Should the procedures of this curator be copied if we wish to increase the population of egrets? Allow for a 5% chance that you would decide on the expensive controlled procedure when it really is not better.

Answer 1