What is the normal acceleration of a car?

I went to everybody's favorite search engine to get some data to answer this question with.  I can't name it, but it rhymes with Floogle.  Anyway, I searched for the phrase "zero to 60" just to get an idea of what's hot.

Floogle pointed me to a website that provided this data on fast cars:

#1). 2016 AMZ Grimsel Electric Race Car 0-60 mph 1.5 sec

#2). 2014 Porsche 918 Spyder 0-60 mph 2.3 sec

#3). 2015 Tesla Model S P90D 'Ludicrous Speed' Upgrade 0-60 mph 2.6 sec

And my favorite, because I own one:

#4). 2000 Dodge Intrepid ES   0-60 mph 8.4 sec

Here are the accelerations for the zero-to-60 times listed for these 4 cars:

#1).  17.88 m/s²  (1.82 G's) 
#2).  11.66 m/s²  (1.19 G's)
#3).  10.32 m/s²  (1.05 G's)
#4).    3.19 m/s²  (0.33 of a G)

That's what these "fast cars" will do, on the track,
with their pedals mashed to the metal.

"Normal" accelerations are all less than these.

It's have to be 12 or idk

The independent variable would be the fertilizer as it is what the dependent variable (the growth of grass) depends on.