170135_inorganicventures_flipping

F-test

Compares precision ! " : $ % = $ ' (standard deviations are equal) ( )*+) = , -- , .- , where $ ' > $ %

Interpretation: If ( )*+) ≤ ( )123 , accept ! " (no statistical difference) If ( )*+) > ( )123 , reject ! " (statistical difference)

Example

! "#$" = & '' & (' = 0.008 ' 0.003 ' = 7.111 ! "/01 = 6.39 ! "#$" > ! "/01 Reject H o à There is a statistical difference

Set 1 (ppm) Set 2 (ppm)

Mean

10.045

10.067

Standard Deviation 0.003

0.008

Observations

8

5