Easy-level statistics interview questions covering fundamental concepts, descriptive statistics, and basic probability. Q1: Explain the difference between mean, median, and mode. Answer: Definitions Mean ($\bar{x} = \frac{1}{n}\sum_{i=1}^{n} x_i$): Arithmetic average of all values Median: Middle value when data is …

Visual guide to percentiles, quartiles, and quantiles for understanding data distribution. What are Percentiles? Percentile: The value below which a given percentage of observations fall. 50th percentile = Median (half the data is below) 25th percentile = First quartile (Q1) 75th percentile = Third quartile (Q3) Key …