A city mayor in Michigan is planning the number of new snow plows he must purchase...
A city mayor in Michigan is planning the number of new snow plows he must purchase to remove the snow next winter. The average snowfall in the past 10 years has been normally distributed with a mean of 112 inches and a standard deviation of 14 inches.
Use Excel to find the amount, in inches, that separates the lowest 20% of the means of yearly snowfall in the past 10 years from the highest 80%.
Homework Answers
X ~ N ( µ = 112 , σ = 14 )
Excel formula
NORM.INV(0.2,112,14) = 100.2173 inches.
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example of 30 quantitative data points
Purpose
State how, when, and where data was collected
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