Question 1202980
n1 = 21
n2 = 18
dof1 = 20
dof2 = 17
critical f-stat = 20/17 = 1.1765.
sd1 = 45600
sd2 = 21330
v1 = 45600^2
v2 = 21330^2
test f-stat = 45600^2 / 21330^2 = 4.57
test f-stat is greater than critical f-stat, therefore variation is assumed to be greater for sampe 1 than for saple 2, i.e. they are not equal.


here's a refeence.


<a href = "http://www.statistics4u.com/fundstat_eng/cc_test_2sample_ftest.html" target = "_blank">http://www.statistics4u.com/fundstat_eng/cc_test_2sample_ftest.html</a>


here's a critical f-stat calcjulator.


<a href = "https://www.danielsoper.com/statcalc/calculator.aspx?id=4" target = "_blank">https://www.danielsoper.com/statcalc/calculator.aspx?id=4</a>