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Substitute natural gas can be synthesized by passing carbon monoxide and hydrogen over Ni or Co at 400°C. This process is an example of homogeneous catalysis.
Variance
A measure of the distribution of data points in a data set around the mean, indicating how spread out the data points are.
Z-score
A statistical measure representing the number of standard deviations a data point is from the mean of its data set, used in standardizing scores for comparison.
Probability Sampling
Sampling based on random selection of the sample units.
Convenience Sampling
Sampling based on convenience to the researcher.
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