Higher percentage of option D ??

Forum for the GRE subject test in mathematics.
yoyobarn
Posts: 80
Joined: Sun Dec 19, 2010 7:01 am

Higher percentage of option D ??

Postby yoyobarn » Sat Jan 28, 2012 7:48 am

Hi, recently I noticed that recent GRE practice papers seem to have more "D"s.

Is it statistically significant? If yes, I might consider "guessing D when in doubt".. :lol:



Expected mean of each option=np=66*1/5=13.2
Variance=npq=66*1/5*4/5=10.56
Standard dev.=3.25

GR0568:
"A"---11
"B"---14
"C"---11
"D"---16
"E"---14

GR9768:
"A"---11
"B"---13
"C"---13
"D"---16
"E"---13

GR9367:
"D"---17

GR8767 (anomaly):
"D"---13

bloopbeep
Posts: 10
Joined: Sat Dec 10, 2011 11:05 am

Re: Higher percentage of option D ??

Postby bloopbeep » Sun Jan 29, 2012 7:42 pm

Your time would be better spent studying.




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