Research Methods & Evidence-Based Practice Flashcards

A fleet technician notes that fuel efficiency has dropped 15% over six months across 40 vehicles. To investigate the root cause, the FIRST step in an evidence-based approach is to:

Answer: Define the problem clearly and gather relevant historical data

Evidence-based problem-solving begins with clearly defining the problem and systematically collecting relevant data before implementing solutions.

In fleet research, a 'confounding variable' is best described as:

Answer: An extraneous variable that influences both the independent and dependent variables

A confounding variable is an outside factor that correlates with both the cause and effect, potentially distorting study conclusions.

Which type of chart is most effective for displaying the distribution of vehicle repair costs across different cost ranges?

Answer: Histogram

A histogram displays the frequency distribution of continuous data like repair costs across defined intervals, making it ideal for this purpose.

Evidence-based practice in fleet management requires that decisions be based primarily on:

Answer: Best available research evidence combined with operational expertise and data

Evidence-based practice integrates the best available research, operational expertise, and real-world data to guide fleet management decisions.

A fleet manager uses a Pareto chart to analyze vehicle defect types. The primary purpose of this chart is to:

Answer: Identify the few defect categories responsible for the majority of problems

A Pareto chart applies the 80/20 rule, highlighting the defect categories that account for most of the total defects so efforts can be prioritized.

When interpreting a study that claims a new oil additive 'significantly improves' engine life, a critical reviewer should first check:

Answer: Whether the finding is statistically significant and what the effect size is

Statistical significance and effect size together determine whether a reported improvement is both real and practically meaningful.

Fleet key performance indicators (KPIs) serve research purposes by:

Answer: Providing quantifiable metrics that enable ongoing monitoring and evidence-based improvements

KPIs provide measurable benchmarks that allow fleet managers to track performance over time and make data-driven decisions.