Re: preparing multiple choice questions

*To*: mathgroup at smc.vnet.net*Subject*: [mg63370] Re: preparing multiple choice questions*From*: Bill Rowe <readnewsciv at earthlink.net>*Date*: Tue, 27 Dec 2005 04:42:40 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

On 12/26/05 at 4:59 AM, berbas at anadolu.edu.tr (Baris Erbas) wrote: >I have been trying to prepare a test of 30 question with multiple >choices ranging from a-e. >I want to automatically assign the question numbers and and the >correct answers using mathematica. All correct answers should be in >equal quantity, i.e. 6 a, 6 b, . 6 e. >I tried to use Random with Table however it doesnt produce equal >number of correct answers. I also tried to look into the >Statistical packages. >Is there a way of doing this in Mathematica? Could you please >froward me to a link if you already know one? The techniques you tried above will not work since the requirement the frequency of each choice be equal is incompatible with randomness. A uniform distribution over the integers 1 to 5 with enough samples will result in *apporoximately* equal numbers of each but not *exactly* equal numbers of each integer. If you require equal numbers of each sample, you can achieve some semblence of randomness by using a random permutation. This could be done as follows In[2]:= ans = {a, b, c, d, e}; << "DiscreteMath`" In[4]:= Flatten[ans[[#]]&/@ Partition[ RandomPermutation[Mod[Range[30], 5, 1]], 5]] Out[4]= {d, a, e, b, a, c, b, e, e, c, a, b, e, c, b, a, c, d, c, d, c, a, a, d, b, e, d, e, b, d} -- To reply via email subtract one hundred and four