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    Means, standard errors, expected values

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    For a population with u=80 and o=20, the distribution of sample means based on n=16 will have expected value of _____ and a standard error of ____.
    * 80; 1.25 (this is the one i had chosen at 1st?)
    * 80; 5
    * 5; 80
    * 20; 20

    Samples of n=16 scores are selected from a population. If the distribution of sample means has an expected value of 40 and a standard error of 2, what are the mean and standard deviation for the population?

    * u=40 and o=32
    * u= 40 and o= 8
    * u= 160 and o=2
    * u=40 and o=2 (this is the one i had 1st chosen??)

    A sample of n=4 scores is selected from a population with u=40 and o=8 and the sample mean is M=43. What is the sample error for the sample mean?
    *3
    *4 (is this correct?)
    *8
    *2

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    https://brainmass.com/statistics/probability/means-standard-errors-expected-values-584632

    Solution Preview

    1. Expected value = mean = 80
    Standard error = o/sqrt(n) = 20/sqrt(16) = 20/4 = ...

    Solution Summary

    3 problems related to standard error are solved here.

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