What is normal, when it comes to people's body temperatures? A random sample of 350 human body temperatures had a mean of 98.35° and a standard deviation of 0.72°. (a) Construct a 99% confidence interval for the average body temperature of healthy people. (Round your answers to two decimal places.) o to (b) Does the confidence interval constructed in part (a) contain the value 98.6°, the usual average temperature cited by physicians and others? If not, what conclusions can you draw? O Since the set of possible values for u given in the confidence interval does not include the value u = 98.6°, it is plausible that the true average body temperature for healthy humans is 98.6°, the usual average temperature cited by physicians and others. O Since the set of possible values for u given in the confidence interval does not include the value u = 98.6°, it is not likely that the true average body temperature for healthy humans is 98.6°, the usual average temperature cited by physicians and others. O Since the set of possible values for u given in the confidence interval includes the value u = 98.6°, it is plausible that the true average body temperature for healthy humans is 98.6°, the usual average temperature cited by physicians and others. O Since the set of possible values for u given in the confidence interval includes the value u = 98.6°, it is not likely that the true average body temperature for healthy humans is 98.6°, the usual average temperature cited by physicians and others.