Useful tips for everyday
What assumption can be checked with a Q-Q plot? In the context of normality of residuals, Q-Q plots can help you validate the assumption of…
How do I know to reject the null hypothesis? After you perform a hypothesis test, there are only two possible outcomes. When your p-value is…
How are measures of distance and correlation between variables used? Two variables have a pair of values for each sample, and we can consider measures…
Why standard error is high in cluster sampling? In fact if secondary units within a cluster tend to be more similar to each other than…
Is central limit theorem random? The central limit theorem states that if you have a population with mean μ and standard deviation σ and take…
Do t distributions have heavier tails? The T distribution, also known as the Student’s t-distribution, is a type of probability distribution that is similar to…
What is a simple probability problem? It is the ratio of the number of ways an event can occur to the number of possible outcomes.…
Can coefficient of skewness be greater than 1? If skewness is negative, the data are negatively skewed or skewed left, meaning that the left tail…
Which diagnostic test is the gold standard? magnetic resonance angiography Now magnetic resonance angiography (MRA) has become the new gold standard, with a reported sensitivity…
What is factorial ANOVA used for? Factorial analysis of variance (ANOVA) is a statistical procedure that allows researchers to explore the influence of two or…