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    Basic Statistics in PHStat

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    * Must write out a NULL & HYPOTHESIS and include BUT WHAT DOES THIS MEAN TO A MANAGER??

    See attached file for solution template.

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    https://brainmass.com/statistics/hypothesis-testing/basic-statistics-phstat-124740

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    Must write out a NULL & HYPOTHESIS
    and include BUT WHAT DOES THIS MEAN TO A MANAGER??

    Problem #1 For this problem use the following contingency table:

    A B Total
    1 20 30 50
    2 30 45 75
    Total 50 75 125

    The null hypothesis tested is
    H0: There is no association between row and column attributes

    The alternative Hypothesis

    H1: There is association between row and column attributes

    Rejection Criteria: Reject the null hypothesis, if the calculated value of chi square is greater than the critical value of Chi square with 1 d.f at 0.05 significance level

    a. Find the expected frequency for each cell.

    Expected Frequencies
    Column variable
    A B Total
    1 20 30 50
    2 30 45 75
    Total 50 75 125

    b. Compare the observed and expected frequencies in each cell.

    The chi square contribution in each cell is given below

    Column variable
    A B Total
    1 0 0 0
    2 0 0 0
    Total 0 0 0

    c. Compare the X2 statistic. Is it significant at alpha () = .05.

    Data
    Level of Significance 0.05
    Number of Rows 2
    Number of Columns 2
    Degrees of Freedom 1

    Results
    Critical Value 3.841459
    Chi-Square Test Statistic 0
    p-Value 1
    Do not reject the null hypothesis

    Conclusion: Since the Chi Square test Statistic is less than the critical value , the null hypothesis that there is no association between row variable and column is accepted

    Problem #2 A survey for Internet users in the United States, Australia, and Europe studied whether those who downloaded music subsequently purchased a CD or tape of the music ("net Music Inspires Buying." USA Today, January 23, 2001, 1A). The survey reported that 77% of Americans, 78% of Australians, and 54% of Europeans who downloaded music get inspired to purchase the CD or tape of music. Suppose the survey was based on a sample of 500 Americans, 250 ...

    Solution Summary

    This solution gives the step by step method for solving business statistics problems using PHSTAT

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