Which Event Marks the Birth of a Star

question 29

Multiple Choice

Which event marks the birth of a star?

• A)formation of the planetary nebula
• B)fusion of hydrogen atoms into helium atoms
• C)collapse of an interstellar cloud
• D)formation of a photosphere
• E)instability in an interstellar cloud

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Definitions:

Hypotheses

Hypotheses are proposed explanations made on the basis of limited evidence as a starting point for further investigation.

Rejection Region

The range of values for which the null hypothesis is considered unlikely and is rejected in a hypothesis test.

Significance Levels

Significance levels indicate the probability of observing the test statistic as extreme as the results obtained, given that the null hypothesis is true, acting as a criterion for the decision of whether to reject it.

Sample Sizes

The number of observations or data points collected in a subset of a population for the purpose of statistical analysis.