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{"ops":[{"insert":"The average weekly earnings of a\u00a0production worker in 2000 were AUD421\n421. Suppose a labor researcher wants to test to\u00a0determine whether this figure is still accurate today.\nThe researcher randomly selects\u00a056\n56\u00a0production workers and obtains a representative\u00a0earnings statement for one week from each. The resulting sample average is AUD434.3\n434.3.\nAssuming a population standard deviation of AUD31.8\n31.8, and a 5% level of significance,\u00a0determine whether the mean weekly earnings of a production worker have changed.\nDetermine the critical value\u00a0zc\u00a0and z score value\u00a0z based on the sample data.\n\nThe critical value\u00a0zc =\n\u00a0\nThe z score value\u00a0z based on the sample data\u00a0= \n\n"}]}
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