Useful tips for everyday
Can you do chi-square with more than 2 variables? Chi-square can also be used with more than two categories. For instance, we might examine gender…
Can you have a negative F value in ANOVA? The numerator of the F ratio equals the quantity n times the variance of the means.…
What is considered a significant percentage change? If either lb or ub is equal to zero, then the percent change is not statistically significant. If…
What kinds of variables are appropriate to use in factor analysis? Linearity: Factor analysis is also based on linearity assumption. Non-linear variables can also be…
Can a confidence interval be zero? A confidence interval that contains zero is not certainty that there is no treatment effect, but that it is…
How to visualize relationship between continuous predictor and discrete variable? There are many options to show the discrete variable on the x-axis, with the continuous…
What is the mean of the mean called? The mean (often called the average) is most likely the measure of central tendency that you are…
How do you find the z score for an 85 confidence interval? X is the mean. Z is the chosen Z-value from the table above….Calculating…
What happens if control limits are too tight? The control limits are set too tightly. This leads to over-adjustment and tampering with the process. Tampering…
When to use the Kruskal Wallis one way ANOVA? Use and Misuse. The Kruskal-Wallis one-way ANOVA is a non-parametric method for comparing k independent samples.…