N.2 Understanding Numerical Data
... • Let’s say that you want to know the lipid content of a typical corn grain. • You could analyze one grain, but how would you know that you’d picked a “typical” grain? • You’d get a better estimate of “typical” if you increased you sample size to a few hundred grain, or even to 10,000. Or to 1,000,0 ...
... • Let’s say that you want to know the lipid content of a typical corn grain. • You could analyze one grain, but how would you know that you’d picked a “typical” grain? • You’d get a better estimate of “typical” if you increased you sample size to a few hundred grain, or even to 10,000. Or to 1,000,0 ...
Microf3
... significantly > scree plot. Tendency to take too much; 2) Enough PC’s should be included to explain >= 90% of the total variance. Tendency to take too few; 3) PC omitted if its variance < average of all PC’s or less than 1 when the correlation matrix is used; ...
... significantly > scree plot. Tendency to take too much; 2) Enough PC’s should be included to explain >= 90% of the total variance. Tendency to take too few; 3) PC omitted if its variance < average of all PC’s or less than 1 when the correlation matrix is used; ...
Power and Sample Size + Principles of Simulation
... Mean different from 0 hypotheses: ◦ ho (null hypothesis) is μ=0 ◦ ha (alternative hypothesis) is μ ≠ 0 ...
... Mean different from 0 hypotheses: ◦ ho (null hypothesis) is μ=0 ◦ ha (alternative hypothesis) is μ ≠ 0 ...
Econ173_sp03MidtermAnswers
... machine is filling jars within 0.2 oz of the mean. Assume that previous studies suggest that the population is normally distributed with population standard deviation of 0.9. How big of a sample do you need to conduct this test? (z0.025=1.96, z0.05=1.645, z0.1=1.28) a. 40 b. 9 c. 34 d. 77 e. 78 Use ...
... machine is filling jars within 0.2 oz of the mean. Assume that previous studies suggest that the population is normally distributed with population standard deviation of 0.9. How big of a sample do you need to conduct this test? (z0.025=1.96, z0.05=1.645, z0.1=1.28) a. 40 b. 9 c. 34 d. 77 e. 78 Use ...
6 Random Sampling and Data Description
... Statistics are numerical quantities calculated from the sample. ...
... Statistics are numerical quantities calculated from the sample. ...
