Useful tips for everyday
What are the 3 different ways of summarizing categorical variables? Summarizing Categorical Variables Frequency tables, pie charts, and bar charts are the most appropriate graphical…
Is it justified to remove outliers? However when an outlier has occurred from an error, the outlier is altering the data in false way, and…
Is machine learning being automated? Automated machine learning changes that, making it easier to build and use machine learning models in the real world by…
What is the different between Friedman test and Kruskal-Wallis test? The Kruskal-Wallis Test is used to analyse the effects of more than two levels of…
What is the difference between an independent measures ANOVA and a repeated measures ANOVA? A repeated measures ANOVA is almost the same as one-way ANOVA,…
How can you Visualise distribution of data consisting of continuous values? 4.1 Histograms and Density. Recall that histograms are used to visualize continuous data. 4.2…
How do you read a rotated component matrix? The rotated component matrix helps you to determine what the components represent. The first component is most…
What happens to the standard deviation when sample data are combined? In other words, the actual sample size doesn’t affect standard deviation. In fact, standard…
What is the null hypothesis in simple regression? The null hypothesis states that all coefficients in the model are equal to zero. In other words,…
What hypothesis test tests for a difference in populations? A t-test is used as a hypothesis testing tool, which allows testing of an assumption applicable…