Useful tips for everyday
At what significance level can you conclude? What Is the Significance Level (Alpha)? The significance level, also denoted as alpha or α, is the probability…
How do you use a sample to make predictions about a population? We can use data from random samples of a population to make predictions…
How to create a daily or monthly sales report? Determine date range: You can choose to create a daily report as well as a monthly…
What is the difference between a between subjects design and repeated-measures design? Between-subjects (or between-groups) study design: different people test each condition, so that each…
What is an exponent when do we use it? Exponents are supercript numerals that let you know how many times you should multiply a number…
How can you tell when variables are considered independent? You can tell if two random variables are independent by looking at their individual probabilities. If…
Can categorical variables be quantitative? A categorical variable doesn’t have numerical or quantitative meaning but simply describes a quality or characteristic of something. The numbers…
What is linear predictor in Cox model? The Cox model is a relative risk model; predictions of type “linear predictor”, “risk”, and “terms” are all…
How do you find the degrees of freedom for a sum of squares? The degrees of freedom for the sum of squares explained is equal…
What is dual formulation? The dual formulation of a mathematical programming problem is the mirror formulation of the primal formulation. The optimal value of the…