The Sketch Above Shows Groups of Stars on the H-

question 48

Multiple Choice

The sketch above shows groups of stars on the H- R diagram, labeled (a) through (e) ; note that (a) represents the entire main sequence while (c) and (d) represent only small parts of the main sequence. Which group represents stars fusing hydrogen in their cores?

• A)a
• B)b
• C)c
• D)d
• E)e

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Definitions:

Confidence Interval

An estimated range of values which is likely to include an unknown population parameter, calculated from a given set of sample data.

Margin of Error

An expression of the amount of random sampling error in a survey's results, indicating a range within which the true value lies at a certain confidence level.

Probability

The extent to which an event is likely to occur, measured by the ratio of the favorable cases to the whole number of cases possible.

Confidence Interval

A range of values, derived from sample statistics, that is believed to contain the true value of an unknown population parameter with a certain degree of confidence.