BME100 f2015:Group10 1030amL3
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ContentsOUR TEAMLAB 3A WRITEUPDescriptive StatisticsHeart Rate Gold Standard Mean: 88.925 bpm Standard Deviation: 23.23 bpm Standard Error: 1.212 bpm
Spree Mean: 88.308 bpm Standard Deviation: 22.99 bpm Standard Error: 1.200 bpm
Gold Standard Mean: 97.25276 degrees F Standard deviation: 1.16813 degrees F Standard error: 0.060322 degrees F
Spree Mean: 99.25642 degrees F Standard deviation: 1.353782 degrees F Standard error: 0.069909 degrees F
Results
AnalysisHeart Rate The data between the gold standard data and the spree measurements is closely related as determined by the Ttest. The pvalue obtained was 0.4. The value is over 0.05 which means that we fail to reject the null hypothesis which means we cannot say that the two sets of data are different. The Pearson's rvalue we obtained was 0.823 which means that it is not completely correlated but they are very close in correlation since this value is very close to 1. For every increase in heart rate according to the gold standard, there is a nearly equal increase in spree heart rate values. Temperature The pvalue obtained for the gold standard data and the spree data was 3.442E74. The value is much less than 0.05 which means we can reject the null hypothesis and say that the two sets of data are different. The Pearson's r value we obtained was 0.13, which means that there is a very weak correlation between the gold standard data and the spree data.
Summary/DiscussionHeart Rate: The values for the Spree heart rate monitor and the Gold Standard were fairly similarly correlated, judging by the high Pearson's R correlation of 0.823. This could be better correlated, however, and ideally would be the same measurements for each. The heart rate monitor could benefit from greater accuracy. The standard deviations were around the same, so precision is not a problem for the Spree headband. The raw readings were also true to the Gold Standard, as shown by the high pvalue on the student's ttest of 0.390, indicating that we cannot claim that they are significantly different from each other. In summary, while the heart rate monitor on the Spree headband has good accuracy and precision, the correlation with the Gold Standard could be improved. This could be accomplished by using the same process of heart rate monitoring that the pulse oximeter uses, or adjusting for the difference numerically.
Both the pvalue from the ttest (4.722E74) and Pearson's r (0.13) indicated that there was very little correlation between the spree data and the gold standard data. A contributing factor to this could have been the fact that the Spree Band did not provide exact values for temperature, but rather rated temperature on a scale of 1 to 4. If the Spree Bands could be programmed to provide an exact temperature value, the correlation would likely by higher. As of now, the results of the experiment show that the Spree Band is not a suitable measure of body temperature.
LAB 3B WRITEUPTarget Population and NeedTarget Population: Anyone above the age of eight would be ideal for the product as people younger might not want or find use for it. Focus is placed on those who currently exercise outdoors in activities such as running or other outdoor sports. People interested in this device would include those who own a fitness monitor or want to own one but are hesitant due to the bulk or fashion limitations. We would want to target those who are interested in a fashionable fitness monitor because our product is designed to retain the accuracy of a more traditional fitness monitor while also prioritizing minimalist design and unintrusive function.
Device Design
Inferential StatisticsGold Standard vs Eyenalyze Heart Rate: Pearson's R: 0.9941295543 Ttest: 0.9359014524
Pearson's R: 0.9630522205 Ttest: 0.7695898988
Pearson's R: 0.9999720695 Ttest: 0.9921419326
Pearson's R: 0.9999976695 Ttest: 0.9978073966
Graph
