Useful tips for everyday
Why are correlation coefficients important in regression? The correlation coefficient, r, tells us about the strength and direction of the linear relationship between x and…
How do I know if I have seasonality? he following graphical techniques can be used to detect seasonality. A run sequence plot will often show…
What assumptions must you make for the confidence interval to be valid? Assumptions and Conditions Randomization Condition: The data must be sampled randomly. Independence Assumption:…
What do meter sticks measure? A meter stick measures one meter and shows only metric units of measurement of millimeters and centimeters. Meter sticks are…
What is overdispersion in Poisson? An assumption that must be fulfilled on Poisson distribution is the mean value of data equals to the variance value…
What is silhouette in K means? Selecting the number of clusters with silhouette analysis on KMeans clustering. The silhouette plot displays a measure of how…
What is a conversion rate and why is it so important to marketers? Conversion rate optimization is important because it allows you to lower your…
How do you fit a regression equation? The Linear Regression Equation The equation has the form Y= a + bX, where Y is the dependent…
Can Likert scale have 6 points? The 6 points Likert scale offers options for Extremely satisfied Very satisfied, Somewhat satisfied, Somewhat dissatisfied, Very dissatisfied, and…
Is it okay to use hypothesis testing with at test when population distribution is not normal? For a t-test to be valid on a sample…