We use an F test rather than a t test for multi group studies primarily to statistics assignment help

We use an F test rather than a t test for multi-group studies primarily to

a.	Avoid calculating standard deviations from the variances.
b.	Be able to use a single formula regardless of differing sample sizes between groups.
c.	Reduce calculation time.
d.	Avoid escalating type 1 error rates.

I doubt between two. Need help clarifying which one would be the correct one

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