Assume You Are Conducting a Two-Tailed Mann-Whitney U Test for a Small

question 15

Multiple Choice

Assume you are conducting a two-tailed Mann-Whitney U test for a small sample and have found that U₁ = 58 and U₂ = 86.What is the value of the test statistic?

• A)58
• B)86
• C)72
• D)144

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Definitions:

Mesozoic

An era of geologic time from about 252 to 66 million years ago, known as the age of reptiles, including dinosaurs.

Cenozoic

The current geological era, beginning 66 million years ago and characterized by the dominance of mammals on Earth.

Precambrian

The earliest part of Earth's history, spanning the time from the formation of the Earth to the start of the Cambrian period, about 4.6 billion to 541 million years ago.

Paleozoic

An era in Earth's geologic history that occurred from about 541 million to 252 million years ago, characterized by the emergence of early life forms.