The following are the values for systolic blood pressure measured in 9 patients who are participating in a study of risk factors for heart disease. 135      125      131      124      139      120      126      141      119 What is the sample standard deviation for systolic blood pressure?

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Q: 0.75 -0.7421 = 0.7707-0.7421 0.85-0-8 2= z = 0.8144 . (z - 0.8)

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