Useful tips for everyday
How do you find the variance of a linear combination? Proof: Variance of the linear combination of two random variables. Theorem: The variance of the…
Which is the best way to fit a distribution? Many textbooks provide parameter estimation formulas or methods for most of the standard distribution types. Use…
Is PAM hierarchical clustering? The R cluster library provides a modern alternative to k-means clustering, known as pam, which is an acronym for “Partitioning around…
How do you use the central limit theorem? The central limit theorem can be used to estimate the probability of finding a particular value within…
How do you find the proportion of a normal distribution? This is given by the formula Z=(X-m)/s where Z is the z-score, X is the…
What does a contingency table show? In statistics, a contingency table (also known as a cross tabulation or crosstab) is a type of table in…
When are unequal sample sizes are and are not a problem in ANOVA? So if you have equal variances in your groups and unequal sample…
How does Matlab calculate autocovariance? c = xcov( x ) returns the autocovariance sequence of x . If x is a matrix, then c is…
What happens to the variance of a scaled variable? If X p is defined as X scaled by a factor of w, then the variance…
How do you discretize a data set? Discretization is the process through which we can transform continuous variables, models or functions into a discrete form.…