Useful tips for everyday
How to use log transformation to stabilize variance? Since the data shows changing variance over time, the first thing we will do is stabilize the…
What linear regression is used for? Linear regression analysis is used to predict the value of a variable based on the value of another variable.…
Can an ordinal variable be binary? Binary. Binary data is discrete data that can be in only one of two categories — either yes or…
Which is the correct definition of a covariance matrix? In probability theory and statistics, a covariance matrix, also known as auto-covariance matrix, dispersion matrix, variance…
How do you find the mean if you know the standard deviation? Step 1: Find the mean. Step 2: Subtract the mean from each score.…
What is variance in mean median mode? Mode is the number which occur most often in the data set. Here 150 is occurring twice so…
How to calculate confidence intervals based on bootstrap? There are a variety of alternative approaches to calculating confidence intervals based on the bootstrap. The first…
How do you assess linearity assumption in regression? The linearity assumption can best be tested with scatter plots, the following two examples depict two cases,…
What is a two way mixed model ANOVA? The two-way mixed-design ANOVA is also known as two way split-plot design (SPANOVA). It is ANOVA with…
What is the relationship between mean and standard deviation in statistics? The standard deviation (SD) measures the amount of variability, or dispersion, from the individual…