The level of nitrogen oxides NOX in the exhaust of cars of a

The level of nitrogen oxides (NOX) in the exhaust of cars of a particular model varies Normally with mean 0.2 g/mi and standard deviation 0.053 g/mi. A company has 15 cars of this model in its fleet.

         L =   

Shelia\'s measured glucose level one hour after a sugary drink varies according to the Normal distribution with ? = 123 mg/dl and ? = 11.5 mg/dl.

What is the level L (?0.1) such that there is probability only 0.03 that the mean glucose level of 4 test results falls above L?   

         L =   

The level of nitrogen oxides (NOX) in the exhaust of cars of a particular model varies Normally with mean 0.2 g/mi and standard deviation 0.053 g/mi. A company has 15 cars of this model in its fleet. What is the level L (½0.0001) such that the probability that the average NOX level x vector for the fleet is greater than L is only 0.01? L = Shelia\'s measured glucose level one hour after a sugary drink varies according to the Normal distribution with ? = 123 mg/dl and ? = 11.5 mg/dl. What is the level L (½0.1) such that there is probability only 0.03 that the mean glucose level of 4 test results falls above L? L =

Solution

What is the level L (