Explore BrainMass

Explore BrainMass

    Random Standard Deviation

    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!

    1. Bill has completed a ten question multiple choice test on which he answered seven questions correctly. Each question had one correct answer to be chosen from four alternatives. Bill says that he answered the test by randomly selecting the answers without reading the questions or answers.

    a. What is the expected number of correct responses under these circumstances if one in fact selects the responses at random. What is the standard deviation?
    b. What is the probability of Bill guessing seven of the ten answers correctly?
    c. What is the probability that one could guess six or more answers correctly?
    d. What do you think of Bill's claim? Explain.

    © BrainMass Inc. brainmass.com March 6, 2023, 1:07 pm ad1c9bdddf

    Solution Summary

    The solution addresses random standard deviation.