The Present Quantity of Water on Earth Was Achieved Approximately

question 101

Multiple Choice

The present quantity of water on Earth was achieved approximately ________ years before the present.

• A)one million years ago
• B)500 million years ago
• C)two billion years ago
• D)10 000 years ago (end of ice age)
• E)4)6 billion years ago

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Definitions:

Sample Correlation Coefficient

A measure that indicates the degree to which two variables are linearly related in a sample dataset.

Level Of Significance

The likelihood of incorrectly dismissing the null hypothesis in a statistical analysis, commonly symbolized by alpha (α), when it is in fact correct.

Null Hypothesis

A statement or assumption in a hypothesis test that there is no significant effect or difference, to be tested against the alternative hypothesis.

Scatterplot

A graph in which the values of two variables are plotted along two axes, the pattern of the resulting points revealing any correlation present.