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The Amount of Time Workers Spend Commuting to Their Jobs

Question 141

Multiple Choice

The amount of time workers spend commuting to their jobs each day in a large metropolitan city has a mean of 70 minutes and a standard deviation of 20 minutes. Assuming nothing is known
About the shape of the distribution of commuting times, what percentage of these commuting
Times are between 30 and 110 minutes?


A) at least 0%
B) at least 95%
C) at least 89%
D) at least 75%

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