Assume that the systolic blood pressure levels are normally distributed with a mean of 120 and a standard deviation of 7. A researcher wishes to select people for a study but wants to exclude the top and bottom 10%. What would be the upper and lowe readings to qualify people to participate in the study? A 108 - 125 B) 111 - 129 113 - 127 D) 120 - 127 E) None of the above

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