High blood pressure affected, Macroeconomics

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To determine whether high blood pressure affected whether a person had a stroke, a sample of 129 people who had had strokes are examined. In the sample, 39% had high blood pressure. If we were to test the hypothesis that at least 31% of the people who have had strokes have had high blood pressure (using the 10% level of signficance) what is the critical value? (please round your answer to 2 decimal places)

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