Useful tips for everyday
What is AB testing in statistics? A/B testing refers to the experiments where two or more variations of the same webpage are compared against each…
How do you find the z-score that corresponds to a right tail area? Area to the Right of a Positive z Score Since the total…
What hypothesis looks at data that is not normal? The null hypothesis states that the population is normally distributed, against the alternative hypothesis that it…
What is an example of a mathematical relation? For example, y = x + 3 and y = x2 – 1 are functions because every…
What does a correlation coefficient show about the relationship between two variables? Correlation coefficients are used to measure the strength of the relationship between two…
What is meant by random experiment in probability? Probability – Part I. Definition : A random experiment is an experiment or a process for which…
How do you test the equality of variance of two normal populations? An F-test (Snedecor and Cochran, 1983) is used to test if the variances…
How do you calculate variance stabilizing transformation? General method for finding variance-stabilizing transformations: If Y has mean µ and variance σ2, and if U =…
What is 90 percent confidence interval? Similarly, a 90% confidence interval is an interval generated by a process that’s right 90% of the time and…
How do you read a neutral on a Likert scale? Neutral denotes a state of confirming their positions. We take in an attitude scale neutral…