An Experiment Was Conducted to Determine the Effectiveness of a Method

question 76

Multiple Choice

An experiment was conducted to determine the effectiveness of a method designed to remove oil wastes found in soil.Three contaminated soil samples were treated.After 95 days,the percentage of contamination removed from each soil sample was measured with a mean of 49.3% and a standard deviation of 1.5%.Estimate the mean percentage of contamination removed at a 98% confidence level.

• A)[48.36 50.24]
• B)[43.27 55.33]
• C)[47.29 51.31]
• D)[47.88 50.72]
• E)[46.47 52.13]

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Definitions:

Adrenal Medulla

The inner part of the adrenal gland that secretes adrenaline and noradrenaline, hormones involved in the body's stress response.

Mesoderm

The middle layer of an embryo in early development, from which most of the body's tissues and structures are derived, including muscle, bone, and the circulatory system.

Ectoderm

The outermost of the three primary germ layers in the embryo, giving rise to the nervous system, skin, and various other tissues and organs.

Mesoderm

The mesoderm is the middle layer of an embryo in early development, giving rise to the musculoskeletal, circulatory, and other systems.