Which Is Not a True Statement

question 69

Multiple Choice

Which is not a true statement?

• A) Ultramafic rocks are commonly made by hot volcanoes in modern time
• B) Most ultramafic rocks were formed when the first crust of the Earth began to form around 4 billion years ago
• C) If you find a sample of komatiite in the field, you have discovered an ultramafic lava
• D) If you find a sample of peridotite in the field, you have discovered an ultramafic plutonic rock that is like granite meaning it has interlocking crystals the cooled under the Earth's surface
• E) Ultramafic rocks are rich in magnesium and iron and this type of igneous rock makes up most of the upper mantle but is rare in the crust

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Definitions:

Population Standard Deviation

A measure of the dispersion or spread of a population's values around its mean, quantifying variability.

P-value Method

A statistical approach used to determine the significance of results in hypothesis testing, indicating the probability of observing data as extreme as the sample data.

Null Hypothesis

It is a hypothesis that assumes no significant difference or effect; it is the statement tested in statistical hypothesis testing to determine the likelihood of the observed data.

Statistically Significant

A determination that the observed difference or relationship in a statistic is not likely due to chance alone, according to a pre-specified threshold of significance.