sigma problems on pcat?

[Phlame217]

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I was talking to a friend earlier today who took the pcat just a week or so ago and she was saying that there was sigma notation on it such as:

or

Is that true or was she maybe confused with the integral sign?

 

[fenixtnlfan]

I'm pretty sure there were these types of questions, but I might be confusing it with the ARCO tests. That whole week was a blur and everything is running together!

 

[nerv12345]

yeah i think i also remember one or two of these problems...but they were very simple

 

[moolman]

Hi,
I was thinking about posting the same question. What are these sigma problems called so I can look them up in a math book. I searched the kaplan material and couldn't find it so far. Unless this this is standard deviation. Also, anybody know how to solve a problem where you have a sigma and then one number above and one number below it. No equation next to it and nothing like k= or i= just a number above and below.

Thanks

 

[nerv12345]

summation problems

 

[omnione]

That's true.

Do note that integrals and summations are different concepts and she should know both.