Why Does the Ratio of Oxygen 18 to Oxygen 16

question 56

Multiple Choice

Why does the ratio of oxygen 18 to oxygen 16 in the oceans increase during an ice age?

• A) More precipitated water remains on land instead of running back to the sea.
• B) There is a different kind of radioactivity occurring in the ocean at the colder world temperatures.
• C) There is a different kind of radioactivity occurring on land at the colder world temperatures.
• D) Sea water freezes into glaciers.

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Definitions:

Null Hypothesis

The null hypothesis is a type of hypothesis used in statistics that suggests there is no statistical significance in a set of given observations.

Observed Counts

The actual numbers counted in each category or group in a study or experiment.

Distribution

In statistics, it refers to the way in which data points are spread or dispersed across a range of values.

T Procedure

The T procedure, often referred to as the T-test, is a statistical test used to determine if there is a significant difference between the means of two groups which may be related in certain features.