The first unit took 10 hours and the third unit took 5.7 hours. What is the improvement rate?
A) 70%
B) 30%
C) 50%
D) 90%
E) 10%

Question

Quizplus · Accepted Answer

The improvement rate can be calculated using the formula for learning curve effect or improvement rate: $Improvement\ Rate = \frac{Time\ for\ first\ unit - Time\ for\ nth\ unit}{Time\ for\ first\ unit}$. Here, the time for the first unit is 10 hours and the time for the third unit is 5.7 hours. Thus, $Improvement\ Rate = \frac{10 - 5.7}{10} = 0.43$ or 43%. However, since this specific option is not available, it seems there might have been a misunderstanding in the calculation or the interpretation of the options. The correct approach to find the improvement rate per unit would involve understanding it as a percentage reduction from the first to the third unit, which typically involves calculating the rate of learning or productivity improvement over the units produced. Given the options and the typical interpretation of improvement rate in a learning curve context, none directly match the calculated 43%, suggesting a possible need for clarification or a different approach to match the provided options. If we consider the closest available option that might represent a standard interpretation of improvement rate in a broader or different context, 30% could be considered a rounded or approximate answer, but without additional context or a specific formula, this is a challenging question to answer directly from the provided information.

The First Unit Took 10 Hours and the Third Unit