A Technician Determines the Concentration of Calcium in Milk Using

A technician determines the concentration of calcium in milk using two instrumental methods.If F_calculated > F_table for the two sets of calcium data,what conclusion(s) can the technician make?
I The difference in standard deviations for the two instrumental methods is significant.
II The difference in standard deviations for the two instrumental methods is not significant.
III The data comes from populations with the same standard deviation.
IV The data does not come from populations with the same standard deviation.

A) I and III
B) I and IV
C) II and III
D) II and IV
E) Only II