Can someone please help me answer the questions pertaining to my data? Thanks Co
ID: 2003110 • Letter: C
Question
Can someone please help me answer the questions pertaining to my data? Thanks
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
-0.04-0.05
-0.13-0.12
Precision Level (%)
3.4%
10.5%
Percent Difference
7.11%
Which data set seems to be more reliable and why? Does this set have less random or systematic error?
3. 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.
4. Comparing the two uncertainty ranges, does any of the data appear to be suffering for any systematic effects? Why or why not?
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
-0.04-0.05
-0.13-0.12
Precision Level (%)
3.4%
10.5%
Percent Difference
7.11%
Explanation / Answer
in the above question, direct pulling method is more reliable because the precision is less in this. So this has less random error.
3. Answer
Two sets provide a statistical different value for those coefficients.
4. Answer
the inclined plane data set appear to be suffering from systematic effects because the uncertainity is greater in this set. normally if there are no systematic effects, then due to random errors the precision will be low.