A Carload of Steel Rods Has Arrived at Cybermatic Construction

question 46

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 measure the lengths of 100 randomly selected rods.If the population of rods have a mean length of 120 centimetres and a standard deviation of 0.05 centimetres,the probability that Claude's sample has a mean less than 119.985 centimetres is ___.

• A)0.9974
• B)0.0026
• C)0.4987
• D)0.0013
• E)0.0030

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Definitions:

TCE

Trichloroethylene, a volatile organic compound used mainly as an industrial solvent and in the manufacture of other chemicals, but is known to be a human carcinogen.

Sclerenchyma Fibers

Thick-walled, durable cells that provide support and strength to plant tissues, playing a key role in the structural integrity of plants.

Vascular Bundles

Structures in plants that contain xylem and phloem, responsible for the transport of water, nutrients, and sugars.

Sclereids

A type of plant cell known for their thick, lignified walls, contributing to the hardness of seeds, nuts, and fruit pits.