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In a reversible reaction, a catalyst will speed up the forward reaction but not affect the reverse reaction.
National Average
The average of a specific set of measurements or data points across the entire nation.
Confidence Interval
An estimate indicating the range within which a population parameter is likely to lie, with a certain degree of certainty, based on data from a smaller sample.
Margin of Error
An expression of the amount of random sampling error in survey results, indicating a range within which the true population parameter is expected to lie.
Sample Size
The number of individual observations or data points collected and used in a statistical analysis.
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