Useful tips for everyday
How do you calculate effect in ANOVA? Effect size for a within subjects ANOVA Total Sum of Squares = Treatment Sum of Squares + Error…
How do you generate random numbers following a normal distribution in R? Random numbers from a normal distribution can be generated using rnorm() function. We…
How do you choose paired t-test? Paired Samples T Test By hand Example question: Calculate a paired t test by hand for the following data:…
What are pooled regression? Pooled regression model is one type of model that has constant coefficients, referring to both intercepts and slopes. For this model…
Does control mean placebo? Placebos are “sugar pills” or “dummy drugs” with no active ingredients and are made to look like the real medicine. A…
What is p value used for? The p-value is used as an alternative to rejection points to provide the smallest level of significance at which…
What are the possible sources of error in this experiment? Common sources of error include instrumental, environmental, procedural, and human. All of these errors can…
What is the best data analyst course online? These are our picks for the best data analytics course: Best Overall: Data Analyst Nanodegree (Udacity) Data…
What makes a chi-square test invalid? If the expected counts (also called expected frequencies) for the cells are very small, the results of the test…
How would you decide whether a variable should be considered as a mediator or a moderator? What’s the difference between a mediator and a moderator?…