For Two Independent Random Samples with N_x and N_y Observations,and

question 52

Multiple Choice

For two independent random samples with n_x and n_y observations,and each following a normal distribution,which of the following would be the F distribution degrees of freedom in the numerator?

• A)n_x - 1
• B)n_x + 1
• C)1 -
• D)n_y - 1

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Definitions:

Fossil Stromatolites

Ancient, layered bio-chemical structures created by the trapping, binding, and calcification of sedimentary grains by microbial mats of microorganisms, especially cyanobacteria, indicative of early life on Earth.

Cells

Basic structural, functional, and biological units of all living organisms, consisting of a nucleus and cytoplasm enclosed in a membrane.

Mesozoic Era

Span of geologic time commonly known as the Age of Reptiles; divided into Triassic (252–201 mya), Jurassic (201–145 mya), and Cretaceous (145–66 mya) periods; ended with the mass extinction of the dinosaurs and many other species.

Dominant Life Form

The prevailing organisms in a particular ecosystem, characterized by their extensive presence and influence on that environment.