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Introduction

GCSE Biology Data Analysis Task The Bleep Test Skill I - Interpreting Data IA (i) (see graphs) (ii) I have devised a general equation based on this derived from the overall spread of data from Lv1-Lv7. It involves using the level number to estimate a BPM reading: Estimated BPM Reading = 127.55 + ( Lv X x 8.75 ). A factor to take into account with this equation is that as a runner reaches Lv8 the BPM estimate becomes less accurate than the estimations from Lv1-Lv7 due to the fact that I have not obtained enough data from this range, so considered unreliable. In my investigation I am analysing the data recorded from 8 people (M) participating in a bleep test and finding ways of explaining the results in scientific terms. Firstly I took the data, found the averages, and removed any outlining results. I then used the data to draw a graph of the results, firstly in Levels and secondly in the actual speed the runners need to travel until the next beep. I then finally drew a line of best fit. IB My graphy shows a fairly contant positive trend. The runners heart rate is directly proportional to the bleep levels, so as the heart rate increases the bleep levels also increase, and vice-verca. Statisticly this is shown as an average increase of 8.75 BPM (9.1%) ...read more.

Middle

The brain then send signals to the lungs to start breathing more rapidly and expand their alveoli to absorb more oxygen. The required amount of adenosine triphosphate is now produced for the muscles to contact at this bleep level. This is why there is a positive correlation between the level of the bleep and the runners BMI. This cycle, for the majority of runners, is broken at the Lv8 mark because the amount of adenosine triphosphate required is too high. This is because lungs and alvioli reach there maximum oxygen intake and cannot transfer stored glucose into adenosine triphosphate at the rate required. There are two different types of muscles used by the runners in this experiment: Slow twitch muscles convert adenosine triphosphate into kinetic energy (muscles contracting) more efficiently than fast twitch muscles and use less oxygen to produce the same amount. However the muscles contract for a longer period of time therefore the kinetic energy is produced at a slower rate than fast twitch muscles. Therefore slow twitch muscles prove most usefully for long and strenuous activities. Fast twitch muscles can use anaerobic respiration to cause a faster transision of chemical to kinetic energy. They do this only for a relitevely short peiod of time because the effect of the uneffeciency in converting oxygen causes a sudden lack of oxygen, halting the activity of the twitch fibres. ...read more.

Conclusion

Just this choice of muscle use can cause unreliable anomalies. In the future this could be improved by excluding results from runners deemed to be mainly dependent on one of these types of muscle. Ec I am reasnobly confident in my conclusion. The range bars are fairly narrow, which show the data I collected was consistent and therfore fairly reliable. The reason behind the fact that im not totally satisified with my conclusion is that there are a few weaknesses in my data. Firstly the accuracy was not measured as accurately as it could have been due to the lack of more advanced equipment. The equipments precision was moderete, so my confidence is also moderate. There was also a limited range of data, with only 8 runners participating in the experiment (and only 3 achieving Lv8, which had to be dismissed on reliability grounds). This could be improved by simply analising more runners, and therefore increasing the reliablility of the data. Secondly the tecnique accurate and logical, so I am confident of the task in that aspect. Weak areas in the data include the disclusion of advanced fair testing, ie enviromental replication and psychological replication of each runners situation. In the future a larger quantity of runners for more results to increase acuracy, as well as more advanced equipment ant techniques is key in increased reliability of the results. ?? ?? ?? ?? March 2011 Page 1 of 6 ...read more.

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