You Find a Fossil Deuterostome in Marine Deposits, That Has

question 69

Multiple Choice

You find a fossil deuterostome in marine deposits, that has several feathery arms at the end of a long stalk.The stalk is composed of tiny discs that resemble a five-pointed star in cross section.This animal is likely a

• A) crinoid.
• B) asterozoan.
• C) echinozoan.
• D) hemichordate.
• E) lancelet.

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Definitions:

Statistics Test

Procedures used in statistical analysis to determine the likelihood that a given hypothesis is true, based on data sampled from a larger population.

Variances

Measures the spread of data points within a dataset relative to the mean, indicating how much the numbers in the set differ from the mean and each other.

T-distribution

A probability distribution that is used to estimate population parameters when the sample size is small and the population standard deviation is unknown.

Degrees of Freedom

The number of independent values or quantities which can be assigned to a statistical distribution, typically calculated as the sample size minus the number of parameters estimated.