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Average cholesterol level of people

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In a sample of 85 people who have had strokes, the average cholesterol level was 255 with a standard deviation of 43. In order to test the hypothesis (at the 5% level of significance) that the average cholesterol level of people who have had strokes was at least 240, what is the test statistic? (please round your answer to 2 decimal places)

Reference no: EM132360253

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