Useful tips for everyday
When to use a categorical variable in a regression? When running a regression with a categorical independent variable, we get results for each level of…
Which is the correct way to use AOV in R? Note that there’s more than one way to include a variable as a random effect.…
Is pooled variance the same as variance? The pooled variance is indicated by the horizontal reference line. It is the weighted average of the sample…
What test is used to test the assumption of normality? Q-Q plot Q-Q plot: Most researchers use Q-Q plots to test the assumption of normality.…
What is the use of standard deviation in machine learning? How is Standard Deviation Used in Machine Learning? Using this metric to calculate the variability…
What is a model in multiple regression? Expanding the Model Multiple regression is an extension of linear regression models that allow predictions of systems with…
Where can I find PX 40? Hence P(x > 40) = P(z > -1.25) = [total area] – [area to the left of -1.25] What…
How do you find the expectation of a continuous function? μ=μX=E[X]=∞∫−∞x⋅f(x)dx. The formula for the expected value of a continuous random variable is the continuous…
What are sampling approaches? Sampling means selecting the group that you will actually collect data from in your research. Probability sampling methods include simple random…
What statistical test is used to compare means? compare means t-test The compare means t-test is used to compare the mean of a variable in…