A Carload of Steel Rods Has Arrived at Cybermatic Construction

question 83

Multiple Choice

A carload of steel rods has arrived at Cybermatic Construction Company.The car contains 50,000 rods.Claude Ong, Manager of Quality Assurance, directs his crew to measure the lengths of 100 randomly selected rods.If the population of rods has a mean length of 120 centimetres and a standard deviation of 0.05 centimetres, the probability that Claude's sample has a mean between 119.985 and 120.0125 centimetres is ___.

• A)0.9925
• B)0.9974
• C)0.9876
• D)0.9544
• E)0.9044

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Definitions:

Ecological Niche

Of a species, unique set of requirements and roles in an ecosystem.

Unique Requirements

Specific needs that are particular to an individual organism, system, or process, distinguishing them from others.

Ecosystem

A biological community of interacting organisms and their physical environment, considered as a system of energy flow and nutrient cycling.

Habitat

Type of environment in which a species typically lives.