DEV Community

Nitin-bhatt46
Nitin-bhatt46

Posted on

1

"Day 42 of My Learning Journey: Setting Sail into Data Excellence! Today's Focus: Mathematics for Data Analysis (Stats Day -21)

STATISTICS FOR DATA ANALYTICS - 20

F Distribution.

When to use :- when we have to check if the means of two groups are significantly different from each other.

In probability theory and statistics , the F - distribution or F-ratio, also known as Snedecor’s F distribution or the Fisher-Snedecor distribution ( after Ronald Fisher and George W.Snedecor ) is a continuous probability distribution that arises frequently as the null distribution of a test statistic, mostly notably i the analysis of variance (ANOVA ) and other F-test.

Comparing the variance or Mean between two groups.

F distribution graphs are mostly Right skewed.

F - test ( Variance Ratio test )

VARIANCE = SQUARE OF STANDARD DEVIATION.

AFTER GETTING SAMPLE VARIANCE =

Step 2 :-

F VALUE = SAMPLE VARIANCE 1 / SAMPLE VARIANCE 2

STEP 3 :-

Decision Rule.

Degree of freedom for both the sample
Alpha value

Feel free to share this post to enhance awareness and understanding of these fundamental concepts in statistical analysis!

🙏 Thank you all for your time and support! 🙏
Don't forget to catch me daily at 6:30 Pm (Monday to Friday)for the latest updates on my programming journey! Let's continue to learn, grow, and inspire together! 💻✨

Image of Timescale

🚀 pgai Vectorizer: SQLAlchemy and LiteLLM Make Vector Search Simple

We built pgai Vectorizer to simplify embedding management for AI applications—without needing a separate database or complex infrastructure. Since launch, developers have created over 3,000 vectorizers on Timescale Cloud, with many more self-hosted.

Read full post →

Top comments (0)

Sentry image

See why 4M developers consider Sentry, “not bad.”

Fixing code doesn’t have to be the worst part of your day. Learn how Sentry can help.

Learn more