Explore BrainMass

Explore BrainMass

    Hypothesis testing : T test

    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!

    The mean age of 25 randomly selected college seniors was found to be 23.5 years, and the standard deviation of all college seniors was 1.3 years. Which of the following is the correct symbol for 1.3 years?
    A. m B. s C. s D.

    A machine produces 3-inch nails. A sample of 10 nails was selected and the lengths determined. The results are as follows:
    2.89 2.95 3.00 3.05 2.99 2.96 3.10 3.06 3.00 3.12
    Use these results to test H0: m = 3 and Ha: m ¹ 3 at a = 0.01. Give the critical region, the computed test statistic, and the conclusion.

    © BrainMass Inc. brainmass.com March 4, 2021, 8:24 pm ad1c9bdddf
    https://brainmass.com/statistics/students-t-test/hypothesis-testing-mean-nail-length-166050

    Solution Preview

    Statistics
    The mean age of 25 randomly selected college seniors was found to be 23.5 years, and the standard deviation of all college seniors was 1.3 years. Which of the following is the correct symbol for 1.3 years?
    A. m B. s C. s D.

    Answer
    B. s
    ----------------------------------

    A machine produces 3-inch nails. A sample of 10 nails was selected and the lengths ...

    Solution Summary

    Step by step method for testing the hypothesis under 5 step approach is discussed here. Excel template for each problem is also included. This template can be used to obtain the answers of similar problems.

    $2.49

    ADVERTISEMENT