Statistical Quality Control Techniques CTEL-TM-OTM Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   What does a correlation coefficient close to +1 indicate about the relationship between two test metrics?

   • AA strong negative linear relationship
   • BA strong positive linear relationship
   • CA causal relationship between the metrics
   • DNo relationship between the metrics
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   A test manager wants to ensure that test data samples include proportional representation from each module's test cases. Which sampling method is most appropriate?

   • AConvenience sampling
   • BStratified sampling
   • CSimple random sampling
   • DCluster sampling
   Reveal Solution Discussion Select an answer first
4. 18application · medium

   A test manager wants to assess whether the test execution process is capable of completing test cycles within the specified 10-day window. Historical data shows a mean cycle time of 8.5 days with a standard deviation of 1.2 days. The specification limits are 6 to 10 days. What is the most accurate conclusion about process capability?

   • AThe process is capable because the standard deviation is small relative to the mean.
   • BThe process capability cannot be determined without a control chart.
   • CThe process is not capable because the specification width is less than six standard deviations.
   • DThe process is capable because the mean is within the specification limits.
   Reveal Solution Discussion Select an answer first
5. 19foundation · easy

   What is the primary purpose of applying statistical quality control (SQC) in test project evaluation?

   • ATo replace the need for test managers to make decisions
   • BTo automate the execution of test cases
   • CTo guarantee that all defects are eliminated before release
   • DTo replace subjective judgment with objective, data-driven monitoring of process stability and performance
   Reveal Solution Discussion Select an answer first
6. 20expert · hard

   A test manager needs to estimate the average defect detection rate across a portfolio of 1,000 projects. The portfolio is divided into three domains: web (600 projects), mobile (300), and embedded (100). The manager has budget to sample 100 projects. To ensure the estimate is representative of the portfolio, which sampling strategy is most appropriate?

   • ASimple random sampling of 100 projects from the entire portfolio.
   • BConvenience sampling of the 100 most accessible projects.
   • CStratified sampling with equal allocation: 33 web, 33 mobile, 34 embedded.
   • DStratified sampling with proportional allocation: 60 web, 30 mobile, 10 embedded.
   Reveal Solution Discussion Select an answer first