Explore BrainMass
Share

Explore BrainMass

    Expected value of sample mean

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    A sample of n=100 scores is selected from a population with u= 80 with o= 20. on average how much error is expected between the sample mean and the population mean?
    * 0.8 points
    * 4 points
    * 0.2 points
    * 2 points

    If random samples, each with n=4 scores, are selected from a normal population with u= 80 and o=36, what is the standard error for the distribution of sample means.
    * 18
    *9
    * 36
    *4

    If all possible random samples with n= 36 scores are selected from a normal population with u= 80 and o= 18, and the mean is calculated of each sample, what is the average of all the sample means?
    * 80
    * 2
    * cannot be determined from the information given
    * 6

    For a particular population a sample n=4 scores has an expected value of 10. for the same population a sample of n= 25 scores would have an expected value of
    * 20
    * 8
    * 4
    * 10

    © BrainMass Inc. brainmass.com October 10, 2019, 7:31 am ad1c9bdddf
    https://brainmass.com/statistics/probability/expected-value-sample-mean-584633

    Solution Preview

    1.
    error between sample and population mean, e = o/sqrt(n) = ...

    Solution Summary

    A few problems of sample expected mean are solved here

    $2.19