Mean, standard deviation and normal distribution HSS.ID.A.4 Grade 11 SBAC Practice Test Questions TOC | Lumos Learning

Mean, standard deviation and normal distribution HSS.ID.A.4 Question & Answer Key Resources Lumos StepUp - Smarter Balanced Online Practice and Assessments - Grade 11 Mathematics

Lumos StepUp - Smarter Balanced Online Practice and Assessments - Grade 11 Mathematics Mean, standard deviation and normal distribution

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Suppose the ideal number of railroad cars on a freight train is 82. A random sample of the lengths of freight trains was taken and the number of cars was counted on each train. The number of cars in the sample was normally distributed. The mean of the sample was 82 with a standard deviation of 6. What percent of the freight trains in the sample had more than the ideal number of railroad cars? Round your answer to the nearest whole number. Do not enter the percent sign.