The Mean Travel Time to Work Is 25

question 82

Multiple Choice

The mean travel time to work is 25.2 minutes (U.S.Census 2010) .Further,suppose that commute time follows a log-normal distribution with a standard deviation of 10 minutes. What is the probability a randomly selected U.S.worker has a commute time of less than 20 minutes?

• A) 30.15%
• B) 34.09%
• C) 65.91%
• D) 69.85%

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Definitions:

Blood pH

A measure of the acidity or alkalinity of the blood, crucial for the body's proper functioning.

Carbon Dioxide

A colorless, odorless gas produced by burning carbon and organic compounds and by respiration. It is absorbed by plants in photosynthesis.

Surface Tension

The elastic tendency of a fluid surface which makes it acquire the least surface area possible, due to intermolecular forces.

Adhesive Forces

Attractive forces between unlike substances, such as water molecules adhering to glass surfaces.