Useful tips for everyday
What are differences in variability? Variability can also be defined in terms of how close the scores in the distribution are to the middle of…
Is linear regression a technique of dimensionality reduction? The method proposed transforms the feature values into representative patterns, termed as symbolic objects, which are obtained…
Which is the best way to transform skewed data? Skewed data is cumbersome and common. It’s often desirable to transform skewed data and to convert…
How do you read computer loadings? Positive loadings indicate a variable and a principal component are positively correlated: an increase in one results in an…
How do you read the Bellman equation? The Bellman equation shows up everywhere in the Reinforcement Learning literature, being one of the central elements of…
What is the standard error of a binomial distribution? The standard error of ¯Xis the square root of the variance: √kpqn. Therefore, When k=n, you…
Can I use both mean and median? We use both median and mean to give us a sense of what the ‘average’ or middle of…
How do you calculate change over time? First: work out the difference (increase) between the two numbers you are comparing. Then: divide the increase by…
What is the importance and implication of random intercept? Typically, random slopes are also an option, and these relate to the effect of time –…
What is expected value of a function of two random variables? The expected value of the sum of several random variables is equal to the…