1. Foundations

Statistics Review — Quiz

Test your understanding of statistics review with 5 practice questions.

Practice Questions

Question 1

Which of the following is a key assumption when applying the Central Limit Theorem?

Question 2

When constructing a confidence interval for a population mean, what effect does increasing the sample size have, assuming all other factors remain constant?

Question 3

A data scientist is performing a hypothesis test to determine if a new machine learning algorithm has a significantly different average execution time compared to an existing algorithm. The null hypothesis ($H_0$) is that there is no difference in average execution times, and the alternative hypothesis ($H_1$) is that there is a difference. If the p-value is $0.04$ and the significance level ($\alpha$) is $0.05$, what is the correct decision?

Question 4

Which of the following is the most appropriate measure of dispersion for a dataset that is highly skewed or contains significant outliers?

Question 5

In the context of evaluating a binary classification model, what does 'precision' measure?