Useful tips for everyday
What determines the height of a normal distribution curve? The mean of a normal distribution determines the height of a bell curve. The standard deviation…
What is Dfbetas? The DFBETAS are statistics that indicate the effect that deleting each observation has on the estimates for the regression coefficients. The COVRATIO…
How do you calculate volatility of a portfolio in Excel? Volatility is inherently related to standard deviation, or the degree to which prices differ from…
How does significance level affect critical value? Critical values for a test of hypothesis depend upon a test statistic, which is specific to the type…
What is the difference between t test and Z test? A t-test is a statistical method used to see if two sets of data are…
How do you describe a model? Modeling involves making a representation of something. Creating a tiny, functioning volcano is an example of modeling. Teachers use…
What is an SD line? The SD line is a line with slope SDY/SDX. It is insensitive to relationship between x and y–it bisects the…
What is the difference between formative and reflective? Reflective measures are caused by the latent construct, whereas, formative measures cause the latent construct. Misspecification exists…
How do you document sample size? When reporting your results, presenting sample size is a very basic step in the overall study. Report sample size…
What is a good vs bad confidence interval? With a 95 percent confidence interval, you have a 5 percent chance of being wrong. With a…