STA 291-021 Summer 2007
... If the data is approximately symmetric and bell-shaped then ◦ About 68% of the observations are within one standard deviation from the mean ◦ About 95% of the observations are within two standard deviations from the mean ◦ About 99.7% of the observations are within three standard deviations from the ...
... If the data is approximately symmetric and bell-shaped then ◦ About 68% of the observations are within one standard deviation from the mean ◦ About 95% of the observations are within two standard deviations from the mean ◦ About 99.7% of the observations are within three standard deviations from the ...
Statistical inference
... • So far our calculations have attempted to estimate the unknown population mean from the known sample mean using a result found directly from the central limit theorem. • However, looking again at our formula, we see that it uses the value of the population standard deviation, σ, and if the populat ...
... • So far our calculations have attempted to estimate the unknown population mean from the known sample mean using a result found directly from the central limit theorem. • However, looking again at our formula, we see that it uses the value of the population standard deviation, σ, and if the populat ...
Math109 homework 1soln
... © 2012 Pearson Education, Inc. Publishing as Prentice Hall. not meaningful. 22. Quantitative. Ratio. A ratio of two data values can be formed so one data value can be expressed 24. Quantitative. Ratio. The ratio of two data values can be formed so one data value can be as a multiple of another. expr ...
... © 2012 Pearson Education, Inc. Publishing as Prentice Hall. not meaningful. 22. Quantitative. Ratio. A ratio of two data values can be formed so one data value can be expressed 24. Quantitative. Ratio. The ratio of two data values can be formed so one data value can be as a multiple of another. expr ...
