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Direct linkJoarder, Anwar H. – International Journal of Mathematical Education in Science and Technology, 2002
The usual formula for variance depending on rounding off the sample mean lacks precision, especially when computer programs are used for the calculation. The well-known simplification of the total sums of squares does not always give benefit. Since the variance of two observations is easily calculated without the use of a sample mean, and the…
Descriptors: Research Design, Mathematics, Statistical Analysis, Sampling
