Explore BrainMass

Explore BrainMass

    Difference of two normal random variables.

    Not what you're looking for? Search our solutions OR ask your own Custom question.

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

    A variable of two populations has a mean of 40 and a standard deviation of 12 for one of the populations and a mean a of 40 and a standard deviation of 6 for the other population. Moreover, the variable is normally distributed on each of the two populations.

    a. For independent samples of sizes 9 and 4, respectively, determine the mean and standard deviation of X1-X2. (See attachment for full questions).

    © BrainMass Inc. brainmass.com December 24, 2021, 5:08 pm ad1c9bdddf


    Solution Summary

    In this solution, the mean and standard deviation of the difference of two independent normal random variables is found. Then a hypothesis about the new random variable is tested.