STATISTICS 1 ... doubts here !!!

[Simona]

hello guys ... so the statistics exam is on the 18th of this month ... so any questions any doubts post them here and we will try to solve them !!!
you can find the past papers for all the maths As + A2 here
LETS GO !

 

[Simona]

how do we find the Σxy ???

 

[Zitayyyyy]

how do we find the Σxy ???

to find Σxy, times the x values obtained by the y values for each set and add them all together to find Σxy

 

[Simona]

okay i get it .... Sxy ????