Useful tips for everyday
Which graph is used to measure data on a single axis? Bar graphs have an x- and y-axis and can be used to showcase one,…
What is the difference between the Bernoulli and Binomial distributions? The Bernoulli distribution represents the success or failure of a single Bernoulli trial. The Binomial…
What does the sign test assume? The sign test compares the sizes of two groups. It is a non-parametric or “distribution free” test, which means…
Why is reverse scoring used? The aim of reverse scoring is to re-code the responses so that a high score is transformed into the corresponding…
How do you select lags in Dickey Fuller test? Set an upper bound pmax for p. Estimate the ADF test regression with p = pmax.…
What is a limitation to Pearsons R? The disadvantages of the Pearson r correlation method are;❖It assumes that there is always o linear relationship between…
What does equality of variance mean? Equal variances (homoscedasticity) is when the variances are approximately the same across the samples. If you are comparing two…
What is a central moment in statistics? In probability theory and statistics, a central moment is a moment of a probability distribution of a random…
What is univariate bivariate multivariate? What’s the difference between univariate, bivariate and multivariate descriptive statistics? Univariate statistics summarize only one variable at a time. Bivariate…
What is the correlation coefficient of a Gaussian copula? Contour lines (in 0.02 steps) of various bivariate distributions, all with standard normal marginal distributions and…