Emissions of nitrogen oxides, which are major constituents of smog, can be modeled using a normal distribution. Let x denote the amount of this pollutant emitted by a randomly selected vehicle (in parts per billion). Suppose the distribution of x can be described by a normal distribution with μ = 1.5 and σ = 0.4. Suppose that the EPA wants to offer some sort of incentive to get the worst polluters off the road. What emission levels constitute the worst 10% of the vehicles? (Round your answer to three decimal places.) The worst 10% of vehicles are those with emission levels greater than ______ parts per billion. You may need to use the appropriate table in Appendix A to answer this question.
Emissions of nitrogen oxides, which are major constituents of smog, can be modeled using a normal distribution. Let x denote the amount of this pollutant emitted by a randomly selected vehicle (in parts per billion). Suppose the distribution of x can be described by a normal distribution with μ = 1.5 and σ = 0.4. Suppose that the EPA wants to offer some sort of incentive to get the worst polluters off the road. What emission levels constitute the worst 10% of the vehicles? (Round your answer to three decimal places.) The worst 10% of vehicles are those with emission levels greater than ______ parts per billion. You may need to use the appropriate table in Appendix A to answer this question.
Emissions of nitrogen oxides, which are major constituents of smog, can be modeled using a normal distribution. Let x denote the amount of this pollutant emitted by a randomly selected vehicle (in parts per billion). Suppose the distribution of x can be described by a normal distribution with μ = 1.5 and σ = 0.4. Suppose that the EPA wants to offer some sort of incentive to get the worst polluters off the road. What emission levels constitute the worst 10% of the vehicles? (Round your answer to three decimal places.) The worst 10% of vehicles are those with emission levels greater than ______ parts per billion. You may need to use the appropriate table in Appendix A to answer this question.
Emissions of nitrogen oxides, which are major constituents of smog, can be modeled using a normal distribution. Let x denote the amount of this pollutant emitted by a randomly selected vehicle (in parts per billion). Suppose the distribution of x can be described by a normal distribution with
μ = 1.5 and σ = 0.4. Suppose that the EPA wants to offer some sort of incentive to get the worst polluters off the road.
What emission levels constitute the worst 10% of the vehicles? (Round your answer to three decimal places.)
The worst 10% of vehicles are those with emission levels greater than ______ parts per billion.
You may need to use the appropriate table in Appendix A to answer this question.
Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.
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