Our hypothesis was that the change in heart rate (from the initial period to the period after completing brief exercise) will be higher for taller students than shorter students. We thought this because the taller they are, the more their body has to work when running. Their heart rate spikes more than shorter students and so it takes them more time to get their heart back down to rest.
We created three graphs that summarized all of our data.
*Note that for graphs 1 and 3, the unit "Heart beats/minute" should be added to the y-axis label*
Graph 1 shows the heights and change in heart rates for the 30 girls that we tested (athletes and non-athletes). Athletes are in blue, and non-athletes in red. From the graph, the trend is that the taller the person, the higher the change in heart rate is. Thus, the slope of the line is greater than that of the non-athlete line of best fit. The person who had the second highest change in heart rate (105 b/m) was the second tallest person (180 cm) in the sample, and the person who was the tallest (187 cm) had the second highest change in heart rate (89b/m). The non-athletes were more similar in change in heart rate (especially for people who were between the heights of 160 and 170 cm) , and there isn't as much of a trend between height and heart rate like there is for athletes.
Graph 3 shows the change in heart rate and the height. It appears that the shorter people in our data had higher changes in heart rates than the taller people, for most of our data points are between people who ranged from 150-170 cm tall. Many of those people between 160-170 cm had changes in heart rate above 60 b/m. This graph allows us to observe that the taller the person, the higher the change in heart rate, for there is a slight positive correlation. It's obviously scattered and not a perfect line, but it is a trend. Plus, there were sources of error.
