f-test

Question 1

when is the f-test applied?

Answer 1

Is used for identify if n the sample variances is indicative of a real difference in population variance

Question 2

what is the formula used for F-test?

Answer 2

https://www.google.com/search?sca_esv=c6b59d112dad26b9&rlz=1C1CHBF_esPE994PE994&sxsrf=ADLYWILKT-tACAhsjp7Fw2rxKw8SEdc3xw:1730421059704&q=f-test+formula&udm=2&fbs=AEQNm0BglSNKPbDQcL4Et01QEIYvJ5VGsHgUL_tsKqYywhWXkknveTpaLEIQiU02u5i1FK60ElrIW9FFtqgEnQbUPTP1v5PQAzhf1Y13Kdv-jba_5gxhg0vDqZDkhJc6r3gAp6AjEH3uQGUsTlbW9bCqWbU_KQmLRMpSvMOHQImtns6Bjg8mdovUCIgSWlsLlCl7eMPas0SlDN3m17qUidJPA2sLM55w-g&sa=X&ved=2ahUKEwjEhc3k8LmJAxXiLTQIHcs1A_gQtKgLegQIExAB&biw=734&bih=695&dpr=1.25#vhid=T6zMVglqyJFDAM&vssid=mosaic

Question 3

What is it used for?

Answer 3

to compare the variance of two samples that are independant and does not belong to the same data set