Question

The table below gives the ages and systolic blood pressure (measured in millimeters of mercury) of 9 randomly selected adults.

Subject # 1 2 3 4 5 6 7 8 9
Age, x 41 44 48 51 54 56 60 64 68
Pressure, y 111 115 118 126 137 140 143 145 147

Part 1: Calculate the mean age of the 9 randomly selected adults. Show the formula that you will use and then calculate the mean age.

Answer: Formula: mean =
Mean:
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