A computer chip producer wants to see if computer chip sales are independent of ousiness cycles in the Turkish economy. Weekly data of chip sales has been collected depending on whether the economy is on rising or falling. Data is given below:

CHIP SALES:

$\backslash$table$[[$State of economy is at:$,$High,Low,TOTAL$],[$RISING$,70,20,90],[$FALLING$,,,],[$TOTAL:$,25,15,40]]$

Test if the chip sales are independent of the state of the economy.