Question: Alex just completed a statistics test. He knows that for all students, the mean mark on the exam was 22 with a standard deviation of

Alex just completed a statistics test. He knows that for all students, the mean mark on the exam was 22 with a standard deviation of 6.25. Alex received a mark of 27. Assuming that test scores are normally distributed, what proportion of students had a lower mark than Alex? Report the proportion to 4 decimal places

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