R-Vlaue
R = sqrt(R^(2)) = sqrt(0.60828) = 0.7799
The statistical analysis of the two trials results shown on the graphs demonstrate that there isn't a significant difference between using a spree sensor and using an oral thermometer with the pulse ox (gold standard) on the heart rates measurements. This proves that the device is capable of giving an accurate and fiable value. The problem is that there is a significant difference between the temperature measurements, there is about 1.1 degrees of range of error. With this information the conclusion can be reached that the spree device is reliable when it comes to measuring the heart rate, but not the body temperature. This could be because it is a measurement done in the superficial part of the skin that is not as reliable as doing it in the inside part of the body. It has a higher percent error than the regular oral thermometer. This device is very useful on the heart rate measurement but is not recommended to measure body temperature.
Our Experiment
This experiment will test the use of an electric arm band meant to generate an electric field directly above the skin in order to repel mosquitoes and prevent the spread of diseases. The purpose of this experiment is to determine the strength of the electric current needed to effectively repel mosquitoes.
-1. The first part of the experiment will consist of a preselected outdoor environment that is known to have a significant amount of mosquitoes, so as to simulate the device’s effects in an everyday environment. The control group will consist of ten randomly selected people. They will first be placed in the environment (one at a time to reduce error), in order to gather data on average mosquito activity.The control group will not have the arm band, and they will walk around the environment for 5 minutes. The number of mosquito bites the hosts received will then be recorded.
-2.The same group of individuals will then be placed in the said environment wearing the arm band. The band will be set to a low level of electricity, creating a small electric field. The trial will be repeated three more times, with the electric level increasing at each trial. Results will then be recorded.
-3. For the next part of this experiment, an enclosed indoor environment will be used. A high number of mosquitoes will be placed in this environment. The same group of subjects will be used (to reduce error), and once again they will not wear the arm band for the first trial, acting as a control group. The number of times the host was bit will then be recorded.
-4. Next, the same group of subjects will be placed in the same environment, however this time they will wear the arm band. The trial will be repeated three times, each time with a stronger electric current. The number of times the host was bit will then be recorded.
-5. Lastly, statistic tests will be ran and the different trials will be compared in order to determine whether or not this product resulted in a significant reduction of mosquito bites.
BME 100 Spring 2017
