This content originally appeared on DEV Community and was authored by Aditi Sharma

P-Value & Critical Region in Probability 📊

Today I explored two important concepts in hypothesis testing:

🔹 P-Value
• Probability of getting results at least as extreme as observed, assuming the null hypothesis is true.
• Low p-value (< 0.05) → strong evidence against null hypothesis.

🔹 Critical Region
• The range of values where we reject the null hypothesis.
• Defined by significance level (α), often 5%.

🔹 Why it matters?

✅ P-value tells us how surprising our result is.
✅ Critical region decides whether to accept or reject a hypothesis.

⚡ Fun Fact: The 0.05 threshold for p-values was first popularized by Ronald Fisher in the 1920s — and it still rules data science & research today! 📖

Python #Statistics #Probability #100DaysOfCode #DataAnalytics

This content originally appeared on DEV Community and was authored by Aditi Sharma

Print Share Comment Cite Upload Translate Updates

APA

Aditi Sharma | Sciencx (2025-09-24T10:13:39+00:00) 🚀 Day 24 of My Python Learning Journey. Retrieved from https://www.scien.cx/2025/09/24/%f0%9f%9a%80-day-24-of-my-python-learning-journey/

MLA

" » 🚀 Day 24 of My Python Learning Journey." Aditi Sharma | Sciencx - Wednesday September 24, 2025, https://www.scien.cx/2025/09/24/%f0%9f%9a%80-day-24-of-my-python-learning-journey/

HARVARD

Aditi Sharma | Sciencx Wednesday September 24, 2025 » 🚀 Day 24 of My Python Learning Journey., viewed ,<https://www.scien.cx/2025/09/24/%f0%9f%9a%80-day-24-of-my-python-learning-journey/>

VANCOUVER

Aditi Sharma | Sciencx - » 🚀 Day 24 of My Python Learning Journey. [Internet]. [Accessed ]. Available from: https://www.scien.cx/2025/09/24/%f0%9f%9a%80-day-24-of-my-python-learning-journey/

CHICAGO

" » 🚀 Day 24 of My Python Learning Journey." Aditi Sharma | Sciencx - Accessed . https://www.scien.cx/2025/09/24/%f0%9f%9a%80-day-24-of-my-python-learning-journey/

IEEE

" » 🚀 Day 24 of My Python Learning Journey." Aditi Sharma | Sciencx [Online]. Available: https://www.scien.cx/2025/09/24/%f0%9f%9a%80-day-24-of-my-python-learning-journey/. [Accessed: ]

rf:citation

» 🚀 Day 24 of My Python Learning Journey | Aditi Sharma | Sciencx | https://www.scien.cx/2025/09/24/%f0%9f%9a%80-day-24-of-my-python-learning-journey/ |

Please log in to upload a file.

There are no updates yet.
Click the Upload button above to add an update.

You must be logged in to translate posts. Please log in or register.