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A study is run to estimate heart rates in women at their first trimester. A sample of pregnant women is selected and their heart rates

A study is run to estimate heart rates in women at their first trimester. A sample of pregnant women is selected and their heart rates (in bpm) are measured as: 80, 86, 87, 88, 83, 79, 81, 94, 89, 84, 92, 85. What is the IQR of the data?

A. 6.5

B. 15

C. 8.5

D. 4.5

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