Even better than examples and explanations, learn by doing: https://projects.fivethirtyeight.com/p-hacking/ https://projects.fivethirtyeight.com/p-hacking/ "Yo

Even better than examples and explanations, learn by doing: https://projects.fivethirtyeight.com/p-hacking/ https://projects.fivethirtyeight.com/p-hacking/ "You’re a social scientist with a hunch: The U.S. economy is affected by whether Republicans or Democrats are in office. Try to show that a connection exists, using real data going back to 1948. For your results to be publishable in an academic journal, you’ll need to prove that they are “statistically significant” by achieving a low enough p-value."