Explore BrainMass

Explore BrainMass

    Hi square goodness of fit.

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

    The Ohio Department of Highways is in the process of selecting a new paint for highway use. Four different paint companies have been contact regarding this need and each of the companies has supplied paint for testing. Before deciding the winner of the new contract, a test was conducted to determine which paint was the best, in terms of how long it would last. The results of the test are as follows:

    Category Paint A Paint B Paint C Paint D
    Days 345 320 350 310

    Each paint is expected to last 330 days. Is there a significant difference between these four paints? Use the chi square distribution at the .05 significant level to answer this question.

    A. Paint B and D are significantly different then paints A and C.

    B. The test result is greater than the critical value, so there is a significant difference.

    C. A decision cannot be made; more testing is required.

    D. The test result is less than the critical value, so there is not a significant difference.

    © BrainMass Inc. brainmass.com June 4, 2020, 1:11 am ad1c9bdddf
    https://brainmass.com/statistics/chi-squared-test/hi-square-goodness-of-fit-384116

    Solution Summary

    Step by step method for computing test statistic for hi square goodness fit is given in the answers.

    $2.19

    ADVERTISEMENT