170135_inorganicventures_flipping

T-test: Form 2

Compares 2 means ! " :̅ % & =̅ % ( (means are equal) ) *+,* =̅ - . /̅- 0 1 233456 7 . 7 0 7 . 87 0 , where 9 :"",;< = 1 .0 7 . /& 81 00 7 0 /& (7 . 87 0 /()

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

Example

! "#$" =̅ ' ( −̅ ' * + ,--$./ 0 ( 0 * 0 ( + 0 * = 10.045 − 10.067 0.005385 40 13 = 7.166 ! ";<= = 2.201 ! "#$" > ! ";<= 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

+ ,--$./ = + (* 0 ( − 1 + + ** 0 * − 1 (0 ( + 0 * − 2) = 0.003 * 8 − 1 + 0.008 * 5 − 1 8 + 5 − 2 = 0.005385