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Math Help - A random sample of size 36 is selected...?

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    A random sample of size 36 is selected...?

    A random sample of size 36 is selected from a population whose mean is 60 and standard deviation is 6. Calculate the probabillity that:
    59 ≤ X ≤ 61
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    Quote Originally Posted by Mitchell View Post
    A random sample of size 36 is selected from a population whose mean is 60 and standard deviation is 6. Calculate the probabillity that:
    59 ≤ X ≤ 61
    I assume X is the random variable 'mean of the sample'. Read this: Sampling distribution - Wikipedia, the free encyclopedia
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    Yeah it is. I meant to put x-bar but it showed up as just X for some reason. But, I'm still not sure what I'm supposed to do here. Do I just find the standard error?
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    Quote Originally Posted by Mitchell View Post
    Yeah it is. I meant to put x-bar but it showed up as just X for some reason. But, I'm still not sure what I'm supposed to do here. Do I just find the standard error?
    Did you read the link? What did it say about the distribution that \overline{X} follows? Where are you still stuck?
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