All I have to do to finish my AP statistics class (and high school) is to answer 2 more questions on this assignment I got.

the question...

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Mental Skill scores averaged 113 for 54 babies who used walkers (Standard deviation of 12) and 123 for 55 babies who did not use walkers (Standard deviation of 15).

Is there evidence that the mean mental skill score of babies who use walkers is different from the mean mental skill score of babies who do not use walkers? Explain your answer.

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I only have the hypotheses that

Mw = Mn or Mw /= Mn

but I don't know where to go from there...

I missed a lot of class and my teacher has already helped me with a bunch of stuff