Topic Explanation:
This experiment collected data on how long it took for 40 original scented Tide Pods to dissolve in two different temperatures of water. The quantitative response variable in the experiment was the time that the tide pods took to dissolve in different temperatures. The first treatment was the tide pods assigned to hot water with a temperature of 100 ℉ and the second treatment was the tide pods assigned to cold water with a temperature of 65℉. After the treatments were randomly assigned to the tide pods they were placed in a jar with their respective water temperatures to see how long it would take to dissolve. The research questions for this experiment was “Do tide pods dissolve quicker in hot versus cold water?” and “What…show more content… The amount of water for each jar in each treatment was ⅔ cups. In order to keep everything in order and consistent, the warm water trial was done first. Water was warmed over the stovetop and the temperature of the water was taken until it reached the desired temperature of 100℉ . Three of the four group members were responsible for timing and recording when each Tide Pod dissolved while the fourth group member was responsible for keeping the water at the desired temperature by stovetop, measuring out the right amount of water, and pouring the water into the mason jars. As soon as the water was poured into the mason jar, the timer began and was stopped when the Tide Pods’ sank to the bottom of the mason jar due to its membrane dissolving and the contents leaking out. Once the timer was stopped the time was recorded in seconds and the jar was dumped out, cleaned, and dried to prepare for another Tide Pod. This process was repeated until 20 Tide Pods dissolved in water at 100℉ and their times were recorded. The same process was done to 20 more Tide Pods but now in colder water at 65℉. In order to get the water to this desired temperature, ice cubes were added one by one to the water before it was poured into the jars and the temperature was recorded until it reached…show more content… The null hypothesis was H0: μHot- μCold = 0 and the alternative hypothesis was HA: μHot- μCold < 0. The data collected for the experiment was plugged into StatKey under a randomization hypothesis test for a difference in means. In order to get an accurate p-value the Statkey standard observed statistic was changed to the experiments observed statistic which was 174.61. This observed statistic was calculated by subtracting the mean time of hot water (53.607 seconds) minus cold water (228.17 seconds) giving an observed statistic of 174.61 seconds. Once the observed statistic was changed, the p-value found was 0 which means that the probability of getting sample mean difference of -174.61 seconds is as or less extreme if there was no difference in the population mean is 0. Since the p-value is less than the assumed significance interval of 0.05, we rejected the null hypothesis. Since we rejected the null hypothesis, there was significant evidence that the population mean amount of time for Tide Pods to dissolve is different in hot water minus cold
