Useful tips for everyday
How does sample variance affect confidence interval? Sample Size and Variability A larger sample size or lower variability will result in a tighter confidence interval…
Is PCA an exploratory factor analysis? Principal Component Analysis (PCA) and Exploratory Factor Analysis (EFA) are both variable reduction techniques and sometimes mistaken as the…
What variable is changed based on another variable? A dependent variable is a variable whose value will change depending on the value of another variable,…
How do you calculate negative predictive value with sensitivity and specificity? Sensitivity=[a/(a+c)]×100Specificity=[d/(b+d)]×100Positive predictive value(PPV)=[a/(a+b)]×100Negative predictive value(NPV)=[d/(c+d)]×100. What determines the positive predictive value of a screening…
Under what circumstance should the decision of a significance test be fail to reject? When your p-value is greater than your significance level, you fail…
How is network density calculated? The network’s density is the number of connections divided by the number of possible connections. A completely linked network has…
What are the causes of bias in machine learning? Machine learning bias generally stems from problems introduced by the individuals who design and/or train the…
Is size a independent variable? In this sense, some common independent variables are time, space, density, mass, fluid flow rate, and previous values of some…
How to calculate the coefficient of variation ( CV )? How to calculate coefficient of variation Both businesses and individuals may find themselves in need…
What kind of test should you use if your values are not normally distributed? A non parametric test is one that doesn’t assume the data…