I will like to know the formula for calculating the minimum sample size required for a comparative study involving 2 groups with unequal size. Group 1 is 10 times greater than group 2.


Question: How do I find wiper refills for my 2008 Nissan Frontier?
Answer: I ran into the same problem recently.  It does appear that all the autoparts places have stopped carrying inserts.  They'd rather sell you a $10-20 blade than a $1-2 insert it seems.  :-)  The good news is that my car dealer DOES still carry inserts, and they're only $1.20 a piece...  Try your dealer, could end up saving you a good deal of money down the road!