Fossils Tell Us About the Long History of Life on the Earth

question 34

Multiple Choice

Fossils tell us about the long history of life on the earth and so far,our fossil record probably represents ____ of all species that have ever lived.

• A) 1%
• B) 5%
• C) 20%
• D) 50%
• E) 75%

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Definitions:

Mean of Scores

Calculated as the sum of all scores or values in a data set divided by the number of scores, representing the average.

One-Tailed

Refers to a hypothesis test in statistics that specifies the direction of the difference or relationship expected between variables, either greater or less, but not both.

Null Hypothesis

A default hypothesis that there is no effect or no difference, and any observed differences in the data are due to chance.

Statistical Test

is a mathematical procedure applied to data in order to determine the significance of relationships or differences among variables.