Useful tips for everyday
Do you test ordinal data for normality? If a variable is ordinal and has at least five categories, making a normality assumption can work well,…
How does R calculate autocorrelation? Instructions Use acf() to view the autocorrelations of series x from 0 to 10. Set the lag. max argument to…
Can Cointegration be spurious? The variables are non-stationary. The residual, ut , is non-stationary and standard results for OLS do not hold. In general, regression…
Which statistical test is used to? Choosing a nonparametric test Predictor variable Use in place of… Chi square test of independence Categorical Pearson’s r Sign…
How is histogram constructed when classes are of unequal width? A histogram looks like a bar chart , except the area of the bar, and…
What happens when a neural network has too much overfitting? Regardless of the specific samples in the training data, it cannot learn the problem. An…
What is the value of mutually exclusive events? If two events have no elements in common (Their intersection is the empty set.), the events are…
How do you interpret raw scores? An individual’s raw score is converted to a number indicating the percent of people in the reference group who…
Can you construct a confidence interval? There are four steps to constructing a confidence interval. Identify a sample statistic. Choose the statistic (e.g, sample mean,…
Is Bayesian a regression? In the Bayesian viewpoint, we formulate linear regression using probability distributions rather than point estimates. The response, y, is not estimated…