Question: An experiment was conducted to examine the effect of age on heart rate when a individual is subjected to a certain amount of exercise. Ten male subjects were randomly selected from four age groups: 10-19, 20-39, 40-59 and 60-69. Each subject walked a treadmill at a fixed grade for a period of 12 minutes and the increases in heart rate (the difference between the before and after heart rate) was recorded in beats per minute. The data are shown in the table below. Does the data provide sufficient evidence to indicate a difference in mean increase in heart rate among the four age groups? Use \(\alpha =0.05\)