Standard Deviation:
RAIIN sensor: 2.03
Oral Thermometer: 1.08
T-Test Results:
2.71 x 10^-6
Pearson's R Correlation:
R=.04242
Results
Analysis
Summary/Discussion
Blood Pressure:
According to the results of the T-Test, the P-value ended up being much smaller than .05. This indicates that there is a statistical difference in the data which is expected because the correlation is so low. This shows how much difference there is in the two devices. Since the Pearson's R value is greater than 0 there is technically a very slight positive correlation, however since the value is so close to zero, this is not an extremely reliable result. Some problems with the Omcron watch sensor were that since it is measuring the blood pressure so far from the heart, it won't be a very accurate reading. The watch sensor also failed to work many times unless it was placed perfectly over the subjects chest. One design recommendation would be to have the watch sensor take the reading from the upper arm. This is closer to the heart and there will be a stronger pulse, this is also where the blood pressure cuff takes the reading which may add accuracy.
Pulse:
The results of the T-Test shows that there is some correlation in the data. The Pearson's R value is right at .5 which indicates that there is a positive correlation between the Omcron watch sensor and the pulse oximeter. Therefore we can conclude that the Omcron sensor is reasonably accurate at measuring the pulse oxygen levels, however it is not accurate at measuring the blood pressure. If the watch sensor was placed on the upper arm as previously suggested, the pulse ox reading would be even more accurate.
Temperature:
According to the results of the T-Test, the P-value ended up being much smaller than .05. This indicates that there is a statistical difference in the data which is expected because the correlation is so low. This shows how much difference there is in the two devices. Since the Pearson's R value is greater than 0 there is technically a very slight positive correlation, however since the value is so close to zero, this is not an extremely reliable result. The RAIIN sensor had a few flaws that we considered to be substantial; these included frequent disconnection, lower temperature readings, failure to reboot, and time needed to give consistent results. The device would benefit from improved bluetooth connection, sensor accuracy, user friendliness, and feedback on the device status.
LAB 3B WRITE-UP
Target Population and Need
Infinity Band is intended for athletes who want to have an accurate measure of their heart rate, blood pressure, and temperature to maximize their training efforts. We believe that the location of the product--the upper arm--provides more accurate information than the leading products, which are placed on the wrist. The information gained is conveniently displayed and stored on the user's smartphone to track progress.
BME 100 Fall 2013
