Modification:The measures taken to correct the errors encountered are as follows:1.While measuring the lines, we realized that standing at an angle which is directly over the line been measured and the ruler gave us a more clear and accurate reading. We conducted a second measurement of all seven lines, which gave us good readings in order to proceed with our lab.

2.For the second error encountered in the lab experiment, after collecting the measurements of the seven lines, we then calculated the mean and standard deviation. With all seven measurements we were presented with a mean of 3.01 and a standard deviation of 2.0465 which was further revealed to not be precise. Line 5 which was the outlier was excluded from the calculation, which then gave a new mean of 2.25 and a Std. Deviation of 0.34496 which was more precise.Conclusion: As the purpose stated, to determine how precise a data set with and without an outlier is, to determine the mass of several similar objects, and to understand the difference in mass amongst each object, and to learn the use of common, simple laboratory equipment, make proper measurements, and process the data using the LabQuest2, from my experiment, it was proven that after the outlier was removed from the data set of measurements, that the data setwithout line 5 measurement was precise. The mass of seven pennies was then conducted, before acquiring the mass of each, we speculated that they would be of similar in mass since they are the same object. But after acquiring the mass of each, we concluded that different mass was obtained because of how old each penny is, what condition it was in, and different environment it was in. We also concluded that the mass of similar objects doesn’t always heal the same in mass.

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- Fall '19