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"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

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