4. (Example 4) How hot is the air in the top (crown) of a hot air balloon? information from Ballooning: The Complete Guide to Riding in the Winds, by Wirth and Young (Random house), claims that the air in the crown should be an average (mean) of 100°C.What is a reasonable and safe range of temperatures? Suppose that 56 readings (for a balloon in equilibrium) gave a mean temperature of x = 97° C.For balloons of this type o =17°C Find a 60% confidence interval for the average temperature at which this balloon will be in steady- state equilibrium. a. b. Find a 85% confidence interval for the population mean concentration of uric acid in the patient's blood. C. Find a 96% confidence interval for the population mean concentration of uric acid in the patient's blood. d. What happens to the width of the confidence interval as the confidence increases?

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