Useful tips for everyday
What is power in hypothesis testing? Power is the probability of making a correct decision (to reject the null hypothesis) when the null hypothesis is…
What type of naive Bayes classifier is best suited for document classification problem? Multinomial Naive Bayes: This is mostly used for document classification problem, i.e…
What is the importance of choosing the appropriate test statistic? The statistical significance of results is an important component to drawing appropriate conclusions in a…
Can you find correlation r when you have 2 categorical variables? For a dichotomous categorical variable and a continuous variable you can calculate a Pearson…
How to estimate the best ARMAX model with one lagged? Determine whether AR/MA terms are needed to correct any autocorrelation in the differenced series ->…
What is RDA redundancy analysis? Redundancy analysis (RDA) is a method to extract and summarise the variation in a set of response variables that can…
How do you do ANOVA in R? ANOVA is a statistical test for estimating how a quantitative dependent variable changes according to the levels of…
How do you back transform log transformed data? For the log transformation, you would back-transform by raising 10 to the power of your number. For…
What if a coefficient is not significant? Interpreting a coefficient that is not statistically significant. If the t-test for a regression coefficient is not statistically…
Why is it bad to have two independent variables? There are often not more than one or two independent variables tested in an experiment, otherwise…