BME100 f2014:Group28 L3

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Lab Write-Up 1 | Lab Write-Up 2 | Lab Write-Up 3
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Contents

OUR TEAM

Name: Diego E. Reyes
Name: Diego E. Reyes
Name: Andrew W. Hamidy
Name: Andrew W. Hamidy
Name: Brandt Hansen
Name: Brandt Hansen
Name: Mohammed Alhusayni
Name: Mohammed Alhusayni
Name: Kyle Brague
Name: Kyle Brague
Name: Kyle Henriksen
Name: Kyle Henriksen

LAB 3A WRITE-UP

Descriptive Statistics

Heart Rate
Average Heart Rate of Gold Standard (BPM) Average Heart Rate of Spree (BPM) Standard Deviation of Gold Standard (BPM) Standard Deviation of Spree (BPM) Standard Error of Gold Standard (BPM) Standard Error of Spree (BPM)
Pre-Walk 79.72 80.28 11.90 13.77 2.21 2.56
During Walk 101.46101.8316.8917.513.143.16
Post-Walk 85.8485.9417.0516.333.173.03

Temperature
Average Temperature of Gold Standard (F) Average Temperature of Spree (F) Standard Deviation of Gold Standard (F) Standard Deviation of Spree (F) Standard Error of Gold Standard (F) Standard Error of Spree (F)
Pre-Walk 97.44101.470.701.850.120.32
During Walk 97.41104.430.701.910.120.33
Post-Walk 97.87102.830.711.770.120.30



Results

Temperature Data The results for our temperature data is as follows. We split up the data analysis into three different categories-"Pre", "Walk" and "Cool". We compared the results that the spree band gave to our gold standard measuring device. As you can see, the results, no matter the category show similar trends. The Spree band is not accurate in giving body temperature. Here is the data to support those claims. The average body temperature for the gold standard during the pre walk is recorded at 97.43°F while the spree band is shown at an average of 101.47 °F. The average gold standard values for the walk portion and cool down portion show very similar averages to the pre phase but the spree shows 104.43 °F during the walk and 102.83°F during cool down. Our T Test values confirm our suspicions about the credibility of the spree band: Pre phase has a T value of 2.7E-17, "Walk Phase" 1.35E-28, "Cool Phase" 3.2E-22 respectively. The pearson's R values for the data are 0.0108, 0.0758 and -0.15686 for "Pre" "Walk" and "Cool" Phases respectively. The data supports our suspicions that the Spree band is not a reliable devise to measure body temperature.

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Heart Rate Data Our heart data was also split into three different categories. There was the Pre-walk, the Walk, and the Cool Down. We compared the data we received from the spree band and our gold standard. We averaged the averages of the gold standard for the pre-walk to have the value of 79.7, where the average of the averages for the spree band was 80.3. Our average averages for the walk were 100.2 and 100.5 for the gold standard and the spree band respectively. Our average averages for the cool down were 84.7 and 83.6 for the gold standard and the spree band respectively. Our average t-test results for the pre-walk was .488, for the walk it was .484, and for the cool down it was .469. This is important as it shows that our results are not significant which means that the spree band was recording results that were similar to the results of our gold standard. Our Pearson's r values also showed that the band was recording results close to that of the gold standard with the values of .305, .617, and .470 for the pre-walk, walk, and cool down, respectively.



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Analysis

For the analysis in this lab we compiled all the data collected by each group and placed them in an excel sheet. To organize the data we separated the data collected into different time slot for example pre-walk column, walk column and lastly cool Down column. Once organized we took the averages of each groups data for each time slot for each group. Unfortunately due to user error some data was not able to b used and omitted from the analysis. Once averages were calculated we found standard deviation and standard error. We then preformed T-test for each time slots using the averages of the time slot to see if there were statistical differences between the spree device and the gold standard devices. Lastly taking the averages of the averages for the spree and gold standard devices for each time slot we created a bar graph for each time slot comparing the two devices.




Summary/Discussion

After analyzing our data, a conclusion can be made for both the Spree and gold standard measurements. T-tests of the averages for the heart rate monitor(gold standard) and Spree band were conducted to compare the two different monitors. The pre-walk t-test gave a 0.868 correlation, the walk t-test gave a 0.935 correlation, and the post-walk t-test gave a 0.838 correlation. These results do give us a positive correlation however, since they are less then .95 correlation, the product may not be as valid as the company says they are. T-tests of the averages for the thermometer(gold standard) and the Spree band were also conducted to compare the two systems. The t-test for the pre-walk gave a 2.7*10^-17 correlation, the walk t-test gave a 1.35*10^-28 correlation, and the post-walk t-test gave a 3.23*10^-22 correlation. Based on these results, it can be seen that the thermometer(gold standard) and the Spree band do not correlate at all and the Spree band does not give accurate results.




LAB 3B WRITE-UP

Target Population and Need

The population that we are going to be targeting are mostly athletes as well as people who enjoy doing outside activities( hiking, beach, bicycling, etc.) . We are targeting these people specifically because our devices is going to measure the amount of UVA/UVB rays one takes in while they are outside. From this it is going to measure the percentage of the risk of developing skin cancer based on the amount of UV one is exposed to.




Device Design

Devise design will appear in a variety of forms. But for starters, the device will be a watch with features to track UVA/UVB radiation exposure. The device, for now, will be "athletic" in appearance so it will be used by users who love to be active in the sun. In later years, as the device gains traction with the general population, we will branch out and create partnerships with other watch brands. We will incorporate our technology into an already successful watch brand such as fossil of skagen. By doing this, our hope is to reach a wider audience, from all different walks of life.




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Inferential Statistics

Normal 365nm Cloud cover 365nm Under 1.5 feet of pool water 365nm Under 1.5 feet of sea water 365nm
Minutes Exposed UVP UVX Digital Ultraviolet Intensity Meter (Joules/m^2) SunSpot (Joules/m^2) UVP UVX Digital Ultraviolet Intensity Meter (Joules/m^2) SunSpot (Joules/m^2) UVP UVX Digital Ultraviolet Intensity Meter (Joules/m^2) SunSpot (Joules/m^2) UVP UVX Digital Ultraviolet Intensity Meter (Joules/m^2) SunSpot (Joules/m^2)
0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
5 9996.20 10060.09 7996.96 7868.63 9576.02 9617.13 8556.89 8715.68
10 19992.40 20636.00 15993.92 16139.83 19173.92 18782.28 17818.69 17830.43
15 29988.60 30827.98 23990.88 23479.18 29459.12 30726.66 28324.03 26964.68
20 39984.80 39321.62 31987.84 30768.99 39633.42 40950.81 34991.98 36244.23
25 49981.00 47676.33 39984.80 39663.90 47980.10 47752.28 42835.84 40929.86
30 59977.20 60010.97 47981.76 47125.10 59292.59 56578.36 55674.29 57473.03
35 69973.40 70437.74 55978.72 53212.03 66626.04 68157.78 59859.05 60181.07
40 79969.60 79302.50 63975.68 62624.61 77947.80 80020.34 68411.44 71065.41
45 89965.80 93980.47 71972.64 69882.59 87852.59 88682.97 81137.87 82604.17
50 99962.00 96375.37 79969.60 80155.93 97074.28 94735.54 88739.71 87215.20
55 109958.20 106400.90 87966.56 89635.80 104739.28 102605.70 99821.34 103603.21
60 119954.40 122184.02 95963.52 98263.04 119753.34 120683.40 109142.53 113382.75
65 129950.60 125531.46 103960.48 103557.09 127149.29 122111.75 115946.12 112392.64
70 139946.80 134635.44 111957.44 114871.40 138673.57 138870.56 119590.96 124990.04
T.Test 0.96 T.Test 0.99 T.Test 0.98 T.Test 0.95
Pearson's R 0.998609 Pearson's R 0.999257 Pearson's R 0.999096 Pearson's R 0.998388




Graph

Normal Conditions

Image:Compnor.png‎

Cloud Cover

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Under 1.5 Feet of Pool Water

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Under 1.5 Feet of Sea Water

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