The value for po is the hypothesized population proportion we are testing for Here we have po n 160 0 85 Z P Po Po 1 Po n 160

Question

The value for po is the hypothesized population proportion we are testing for Here we have po n 160 0 85 Z P Po Po 1 Po n 160 Step 2 Now that all of the values have been identified the test statistic can be calculated Use p 0 78 p 0 85 and n 160 to find the value of the z test statistic rounding the result to two decimal places 0 78 0 85 0 85 1 0 85 160 There was a sample of 160 items given so we have

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