Statistical Quality Control Techniques CTEL-TM-OTM Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   In the context of test project evaluation, which activity best exemplifies the application of statistical quality control?

   • AAnalyzing weekly defect arrival rates to detect unusual spikes
   • BAssigning testers to different modules
   • CUpdating the test plan with new test cases
   • DConducting a team meeting to discuss test progress
   Reveal Solution Discussion Select an answer first
2. 22foundation · easy

   Which capability index accounts for both process variation and process centering?

   • ACpk
   • BCpm
   • CCp
   • DCg
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4. 23application · medium

   A test manager wants to estimate the proportion of defects that are critical in a large set of 10,000 reported defects. To save time, a sample of 200 defects will be reviewed. The defects are stored in a database ordered by the date they were reported. Which sampling method is most appropriate to avoid bias?

   • ASelect defects only from the most recent month.
   • BSelect every 50th defect from the database.
   • CSelect the first 200 defects from the database.
   • DUse simple random sampling by generating 200 random numbers and selecting the corresponding defects.
   Reveal Solution Discussion Select an answer first
5. 24application · medium

   A test manager collected data from 20 test cycles and found a correlation coefficient of 0.85 between the number of test cases executed and the number of defects found. The manager wants to predict the number of defects for a future cycle with 150 test cases. What is the most appropriate approach?

   • AUse the average defect rate from the 20 cycles to predict defects.
   • BUse the correlation coefficient directly to predict defects.
   • CPerform a regression analysis to develop a prediction equation, then use it to estimate defects.
   • DConclude that more test cases always cause more defects.
   Reveal Solution Discussion Select an answer first
6. 25foundation · easy

   What does a point falling outside the upper control limit on a control chart indicate?

   • AThe process is exhibiting a special cause of variation that should be investigated
   • BThe process is stable and within expected variation
   • CThe control limits need to be recalculated immediately
   • DThe process is capable of meeting specifications
   Reveal Solution Discussion Select an answer first