Question

Please help I'm very confused.

Part 2 Coefficients of Friction between wood and rubber surfaces Direct Pulling Method Incline Plane Method 0.72 0.71 0.70 0.91 0.79 0.66 0.74 0.79 0.75 0.87 Uncertainty Range Precision Level (%). 0.79 -0.09 0.74 +-0.03 4.05% 11.39% Direct Pulling Method 6.09% Incline Plane Method Percent Difference 6.49%

a. Which data set seems to be more reliable and why? Does this set have less random or systematic error?

b. Given the percent difference between the two sets, do you think the two sets provide a statistical different value for those coefficients, or do you think they are statistically the same? Use the uncertainty ranges to help explain this.

c. Comparing the two uncertainty ranges, does any of the data appear to be suffering from any systematic effects? Why or why not?

Answer 1

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