A Layer of Sediment Composed of Tiny Shell Fragments and Dead

question 39

Multiple Choice

A layer of sediment composed of tiny shell fragments and dead plankton that gets thicker as it moves away from mid-ocean ridges and covers most of the ocean floor,but is too thin to have been accumulating since the formation of Earth,suggests that _____________.

• A) plankton and shelled organisms evolved recently
• B) plankton and shelled organisms do not often die and sink to the bottom of the ocean
• C) the ocean floor is younger toward the mid-ocean ridge
• D) All of the above are correct.

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Definitions:

Sample Standard Deviation

A measure of the dispersion or variability of a set of sample data points around the sample mean.

Spec Limits

Short for "Specification Limits," which are the maximum and minimum values within which a product or process's performance measures must lie to meet customer requirements.

Sample Mean

The average value calculated from a subset of a larger population, used in statistics as an estimate of the population mean.

OC Curve

Operating Characteristic Curve, a graph that describes how well a statistical test or procedure performs in detecting a true condition.