Levels Tought:
Elementary,Middle School,High School,College,University,PHD
Teaching Since: | Apr 2017 |
Last Sign in: | 236 Weeks Ago, 3 Days Ago |
Questions Answered: | 12843 |
Tutorials Posted: | 12834 |
MBA, Ph.D in Management
Harvard university
Feb-1997 - Aug-2003
Professor
Strayer University
Jan-2007 - Present
how accurate are the answers on tutor-work? For example either factor A or B can cause a certain disease, but only when followed by exposure to factor Z. Exposure to factor Z alone is not followed by the disease, but the disease never occurs in the absence of exposure to factor Z, Factor Z is: i think the answer should be, necessary but not sufficient but the answer from tutor- work is necessary and sufficient. which answer is correct?
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