As part of a research project, the blood pressures of 2000 patients in a hospital are recorded. The systolic blood pressures (given in millimeters) have an approximately normal distribution with mean μ = 129 and standard deviation σ = 14. Use the 68-95-99.7 rule to complete the following. (a) Estimate the number of patients whose blood pressure was between 115 and 171 millimeters. (b) Estimate the number of patients whose blood pressure was between 115 and 157 millimeters.
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Step 1
To do this, we first need to find the total number of values in the data set (2000). This is 2000/5=1000. Show more…
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