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Which of the following is a mandatory requirement for performing a K-means clustering analysis?
2 In statistical hypothesis testing, what does the Jarque-Berra test specifically evaluate?
3 What can be directly identified by inspecting the median's position relative to the center of the box in a box-and-whisker plot?
4 If a data distribution is divided into quartiles, the third quartile (Q3) represents which percentile?
5 A survey question using categories like 'Strongly disagree', 'Neutral', and 'Strongly agree' is an example of which scale?
6 What does a dummy-variable regression analysis examine?
7 In an OLS (Ordinary Least Squares) model, how does the variance of the slope estimate (var(b1)) behave as the sample size (N) increases?
8 What is the mean value of a variable that has been converted into Z-scores?
9 Using the IQR method to detect outliers, which formula defines the lower limit?
10 Which sampling technique involves dividing the population into groups based on auxiliary variables to ensure specific representation? 