In order to monitor the ecological health of the Florida Everglades

In order to monitor the ecological health of the Florida Everglades, various measurements are recorded at different times. The bottom temperatures are recorded at the Garfield Bight station and the mean of 30.4 C is obtained for 61 temperatures recorded on 61 different days. Assuming that the population standard deviation is 1.7 C

1. what is the point estimate for the pop mean of all temp.

2. which confidence interval would we likely use? Z or T?

3. construct and interpret a 95% confidence internal estimate of the pop mean of all such temps

4.construct and interpret a 90% confidence internal estimate of the pop mean of all such temps

5. how big of a sample would we need to take if we wanted to find a 00 percent confidence interval with margin of error of only 0.1 degrees celcius