Essay
Heart Rates and Exercise Narrative
An experiment was conducted to examine the effect of age on heart rate when a person is subjected to a specific amount of exercise. Ten men were randomly selected from each of four age groups: 10-19, 20-39, 40-59, and 60-69. Each man walked a treadmill at a fixed grade for a period of 12 minutes, and the increase in heart rate (the difference before and after exercise) was recorded (in beats per minute). The data are shown in the table. 
-Refer to Heart Rates and Exercise Narrative. Find the approximate p-value for the test in the previous question.
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