# BME100 s2014:W Group4 L3

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# OUR TEAM

 Name: Matthew Gerveler Name: Kevin Virgen Name: Dirk Marshall Name: Rachel Baca Name: Catherine Scarborough

# LAB 3A WRITE-UP

## Descriptive Statistics

Blood Pressure:
Mean:
Blood Pressure Cuff: 120.0
Omcron Watch Sensor: 113.5

Standard Deviation:
Blood Pressure Cuff: 18.5
Omcron Watch Sensor: 14.6

T-Test Results:
7.70434e-5

Pearson's R Correlation:
R=.0158

Pulse
Pulse Oxygen Levels:
Mean:
Omcron Watch Sensor: 87.8
Pulse Oximeter: 86.7

Standard Deviation:
Omcron Watch Sensor: 16.2
Pulse Oximeter: 13.9

T-Test Results:
0.1198168

Pearson's R Correlation:
R=.50429

Temperature:
Mean:
RAIIN sensor: 96.50
Oral Thermometer: 97.08

Standard Deviation:
RAIIN sensor: 2.03
Oral Thermometer: 1.08

T-Test Results:
2.71 x 10^-6

Pearson's R Correlation:
R=.04242

## 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.

## Inferential Statistics

164 125
166 150
160 120
170 156
166 140
172 189
176 152

Standard Deviation of Infinity Band: 5.345224838
Standard Deviation of Leading Band: 22.87543911

P-Value: 0.041326955
Since the P-Value is less than 0.05, the heart rates taken by the two bands are statistically different.

Infinity Band VS Established HR Monitor
164 165
166 168
160 158
170 173
166 163
172 170
176 174

Standard Deviation of Infinity Band 5.345224838
Standard Deviation of Established HR Monitor 5.707138387

P-Value 0.887109738
Since the P-Value is greater than 0.05, there is no statistical difference between the heart rates taken by the two devices.