Q:

The "Garbage Project" at the University of Arizona reports that the amount of paper discarded by households per week is normally distributed with mean 9.4 lb and standard deviation 4.2 lb. What percentage of households throw out at least 10 lb of paper a week? (Round your answer to one decimal place.) %

Accepted Solution

A:
Answer: Pr= 42.9%Step-by-step explanation: SD = 4.2Mean = 9.4That is data are distributed between 9.4+/-4.2Which is between 5.2 - 13.6Probability of at least 10lb is given by;Pr= 13.6-10 / 13.6-5.2Pr= 3.6/ 8.4Pr= 0.4286Γ— 100%Pr= 42.9%