A project consists of four activities with information as shown in the table. What is the overall standard deviation of the project's duration?

Activity Predecessor Length Standard Deviation
A -- 10 2
B A 12 3
C A 16 2
D B, C 14 3

A) 6.2
B) 4.1
C) 2.8
D) 5.1


B

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A ________ for technology is important for decision-making before investment.

A. trial subscription B. consultant C. cost/benefit analysis D. competition research

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Indicate whether the statement is true or false

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