Question

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 (%)
Percent Difference


1. Complete the values in the table for the uncertainty ranges and precision levels for each set and find the percent difference between the two sets. Show your worked out calculations below:
2. Which data set seems to be more reliable and why? Does this set have less random or systematic error?
Answer:
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.

Answer 1

Answer:

Explanation:

fraction: 2.5=2510. Both numerator and denominator simplify to small number by divide the LCD of both numbers which is 5.

The most simple fraction will be 52.

percent: since percent= a number ⋅100%

2.5×100%=250%