Useful tips for everyday
What is a random variable How is it related to a distribution? A random variable has a probability distribution that represents the likelihood that any…
How to calculate the area of a triangular distribution? For a triangular distribution this involves finding the area of one or two triangles and, possibly,…
How can I impress someone on chat? To make a connection with someone you’ve just met, keep these tips in mind. Use your wardrobe and…
How do you find the expected value for a confidence interval? First estimate the expectation of the normal distribution by the sample mean, then the…
Can a Pareto chart be used for a large data set? With some large data sets, however, there may be a large number of categories…
What is the probability of failing to reject the null hypothesis? When the null hypothesis is true and you reject it, you make a type…
How are variable transformations used in regression analysis? Variable Transformations Linear regression models make very strong assumptions about the nature of patterns in the data:…
Which is the best transform for the predictor variable? After transforming the response variable, it is often helpful to transform the predictor variable as well.…
How do you evaluate a clustering algorithm? Clustering Performance Evaluation Metrics Silhouette Coefficient. The Silhouette Coefficient is defined for each sample and is composed of…
Can you use Excel for t test? To run the t-test, arrange your data in columns as seen below. Click on the “Data” menu, and…