1. Descriptive Statistics

Exploratory Data Analysis — Quiz

Test your understanding of exploratory data analysis with 5 practice questions.

Practice Questions

Question 1

A data analyst is performing Exploratory Data Analysis (EDA) on a dataset of customer ages. The analyst observes that the distribution of ages is heavily concentrated on the younger side with a long tail extending towards older ages. Which term best describes this distribution?

Question 2

In Exploratory Data Analysis, if a dataset has a correlation coefficient ($r$) of $-0.92$ between two variables, what does this indicate about their relationship?

Question 3

Which of the following is a key step in generating hypotheses for further statistical modeling during Exploratory Data Analysis?

Question 4

Which of the following scenarios would most strongly suggest the need for a robust outlier detection method beyond simple interquartile range (IQR) rules in an EDA context?

Question 5

A data scientist is analyzing a dataset where the mean and median are significantly different, and a histogram shows a long tail to the right. Which of the following transformations would be most appropriate to achieve a more symmetric distribution for subsequent modeling?