BME100 f2014:Group17 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 Name: Maribel Hernandez Name: Lauren Britton Name: Nermin Elsharawy Name: Aron Lopez Name: Measho Habtemichael Name: Talal Alzouman LAB 3A WRITE-UP Descriptive Statistics Tables summarizing the mean, standard deviation, and standard error when comparing temperature in degrees Farenheit between the Spree and the thermometer (gold standard). Tables summarizing the mean, standard deviation, and standard error when comparing heartbeats per minute (bpm) between the Spree and the gold standard. Results File:Chart2graph.jpg Analysis A T-test was used to examine the average (mean) values for the heart rates taken during the walk. The two variables analyzed were the gold standard and the spree heart rates in beats per minute (bpm). The p-value generated from the t-test was 0.8571, which is greater than 0.05. This indicates that there is no significant difference between the gold standard heart rate and the Spree heart rate. However, it was noted that during several readings, the Spree's readings differed from that of the gold standard. It should be noted that the average displayed in the t-test chart will be slightly different than those in the results and descriptive statistics section due to the omitting of certain data due to no recorded Spree readings. The Pearson's r value indicates a decent relationship between the two variables (0.85) however a correlation greater than 0.9 is preferred. Summary/Discussion In this lab the Spree was tested against a pulse ox and an oral thermometer to identify its accuracy. At first the spree failed to read pulse until the subject was changed. Once the subject was changed, it began reading the pulse. It was clear then that the Spree does not work for every one. Comparisons couldn’t really be made in between the spree and the oral thermometer since the spree shows body temperature by three colors: blue, yellow, and red. Once the subject became more active or body temperature began to rise, the readings in between the Spree and the pulse ox began to differ. Before even testing the Spree, one big flaw was clear. There is no way to accurately find body temperature if it is not inside the actual body. In order for the spree to actually measure precisely, it must find a way to test from the inside of the body rather than just the surface of the skin, which can be affected by climate. Another thing that would help its accuracy would be to have accurate readings when the subject’s pulse began to rise so there won’t be so much error when compared to the pulse ox. It would be more helpful to make the Spree more sensitive in order to pick up readings with everyone that attempts to use it. As can be seen in the graphs, the Spree is much more accurate in recording heart rate than temperature as the standard deviation is much greater in the Spree when compared to the thermometer. The standard deviations are much more similar when comparing the heart rate data between the Spree and the gold standard device, indicating the Spree is more accurate at measuring heart rate than temperature. This indicates that there is room for improvement in the design. LAB 3B WRITE-UP Target Population and Need Device Design Inferential Statistics Graph