statistics help

Tests on a Chevy Cobalt incdicate a population mean of 32 mpg and a population standard deviation of 3.5 mpg. You take an SRS (sample random sample) of 10 cars to get a sample mean. What is the probability that your sample mean is greater than 34 mpg?

I am not sure how to go about this problem. Can someone help?

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asked by S
  1. Z = (score-mean)/SEm

    SEm = SD/√n

    Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score.

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    posted by PsyDAG
  2. What is SEm??

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    posted by S
  3. Nevermind, thanks for the help!

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    posted by S

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