BME100 f2014:Group9 L3

BME 100 Fall 2014	Home People Lab Write-Up 1 | Lab Write-Up 2 | Lab Write-Up 3 Lab Write-Up 4 | Lab Write-Up 5 | Lab Write-Up 6 Course Logistics For Instructors Photos Wiki Editing Help
OUR TEAM Kevin Koza Phil Liles Logan Murphy Cameron Hiller Tiffany Gong Evan Targioni LAB 3A WRITE-UP Descriptive Statistics Temperature values: MEAN (Fahrenheit) STANDARD DEVIATION STANDARD ERROR COUNT Thermometer Spree Thermometer Spree Thermometer Spree Pre-Walk Trial 97.43640244 101.4634146 0.782410976 2.618858073 0.061283157 0.205124795 164 Walking Trial 97.41580808 104.4292929 0.884035515 3.023903175 0.044480654 0.152149081 396 Cool Down 97.87153374 102.8895706 0.80258752 2.000018819 0.063057231 0.157136319 163 Pulse values: MEAN (BPM) STANDARD DEVIATION STANDARD ERROR COUNT Pulse-Ox Spree Pulse-Ox Spree Pulse-Ox Spree Pre-Walk Trial 79.77443609 80.63909774 13.34485291 15.00118094 1.1571455 1.300767354 133 Walking Trial 100.5754986 101.1196581 21.35868838 21.55941785 1.140042446 1.150756593 351 Cool Down 85.10204082 84.14965986 18.02461585 17.2873989 1.486645259 1.42584063 147 Results Inferential Statistics: T-Test (P-Value) Pearson's R TEMPERATURE Pre-Walk 6.41479E-44 0.088898436 Walking 3.6329E-156 0.026603598 Cool-Down 4.50837E-64 -0.168213517 HEART RATE Pre-Walk 0.183725934 0.867786916 Walking 0.373610275 0.857847479 Cool-Down 0.061933959 0.94041646 A T-test was executed due to how there are only two factors being compared in these trials. The test to determine Pearson's R was executed because it shows whether or not the values in the trials correlate. Analysis In terms of temperature readings, the Spree has an extremely low p-value, which shows that there is a large amount of variation in the reading of the standard and that of the Spree. This shows that it does not produce accurate readings. Also, the value for Pearson's R in this experiment shows that there is no real correlation between the values. However, the values for the heart rate show more accurate readings. The only trial which nearly possesses statistical significance is the post-walk/cooldown, as the p-value is .061. The Pearson's R for these tests are close to 1, so the values do correlate, unlike the temperature. Summary/Discussion Since both the p-value is extremely low, and how Pearson's R is close to zero for the temperature readings, it is clear that the Spree is not accurate in its readings. However, the measurements for heart rate are almost accurate, as the p-value for the tests are much closer to .05, and the Pearson's R is near 1. Yet, they are not close enough to hold significance. Overall, the Spree is a flawed device. One major design flaw is that it measures temperature externally, which is unlikely to produce a clear and consistently accurate result. LAB 3B WRITE-UP Target Population and Need The Swoleband is a new biomedical device which measures heart rate and levels of sodium and lactate (to derive a measure of lactic acid) in sweat. This device is targeted toward athletes, as the information it provides can help measure hydration and fatigue, along with physical exertion. The measure of sodium levels in sweat helps to maintain hydration, as a higher concentration typically means dehydration, which is necessary to avoid. The measurement of lactic acid provides information about how fatigued a person is, and it can help a person avoid overexertion. Also, this measure can be used to show that athletes are not exercising to a nearly full potential, so the device can tell them to keep going. Device Design Inferential Statistics Data: Average Standard Deviation Standard Error Standard Swoleband Standard Swoleband Standard Swoleband Heart Rate 93.78 93.37 19.21 18.93 3.70 3.64 Sodium Concentration 28.06 28.15 5.95 5.81 1.19 1.16 Lactate Concentration 22.78 22.82 3.16 3.10 .6599 .6472 T-Test Pearson's R Heart Rate .2036 .996 Sodium Concentration .506 .994 Lactate Concentration .296 .999 Since the p-values assigned by the t-test are much higher than .05, it shows that the data shows an extremely low difference between the two groups. This means that the device is highly accurate. The Pearson's R coefficient approaches 1, signifying that the data shows correlation. Graph