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Assumptions for Chi-Squared Test

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13.2 Checking the Assumptions for a Chi-Square Goodness-of-Fit Test

Researchers sample a random selection of divorced workers at a corporation and test if the percentage of divorces that involve blue collar workers is 50%; white collar workers is 45%; and executives is 5% . Does the data collected below fit the sample size requirement for a X2 one-way test?
           Blue-collar             White-collar             Executives
                  50                              35                             4


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