Useful tips for everyday
What is the difference between X Bar and X? The x-bar_ is the symbol (or expression) used for the sample mean statistics. It is used…
Can you do PCA with categorical data? While it is technically possible to use PCA on discrete variables, or categorical variables that have been one…
How do you calculate SS in 1 way ANOVA? The Mean Sum of Squares between the groups, denoted MSB, is calculated by dividing the Sum…
What is full factorial analysis? In statistics, a full factorial experiment is an experiment whose design consists of two or more factors, each with discrete…
What is the probability that a poker hand contains exactly one pair? Frequency of 5-card poker hands Hand Distinct hands Probability Straight (excluding royal flush…
Which is the best fit for Best subsets regression? However, if you have 20 variables, it fits 1,048,576 models! Best subsets regression fits 2 P…
What do you do in univariate analysis? Univariate analysis explores each variable in a data set, separately. It looks at the range of values, as…
What will happen to a research if there are failures in the data collection? The consequences of failing to properly collect data include the inability…
Can you do factor analysis with ordinal data? If the model includes variables that are dichotomous or ordinal a factor analysis can be performed using…
How to randomly sample your empirical arbitrary distribution? One can imagine that the uniform random numbers are sun rays that are emitted from the y-axis…