True or False: If no leaks occur during three trials, the results prove that the prototype will never leak in use.
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True or False: If no leaks occur during three trials, the results prove that the prototype will never leak in use.
A student compares two packaging materials. For material P, the table records dent depth after ten drops. For material Q, it records how many of ten drops caused any visible damage. What is needed before these summaries can fairly establish which resists damage better?
Before testing, a student specifies that at least 90% of seeds must reach the correct tray in a sorting device. The test achieves 70%, and the student suggests lowering the threshold to 70% in the report. Which response best preserves a fair evaluation?
In an app test, most comments concern small text, but two users also report that they cannot find the save button. The student enlarges the text. What should happen before claiming that all recorded usability problems are resolved?
A student compares two insulating sleeves. One cup starts at 80°C and the other at 60°C. After ten minutes, the student uses the final temperatures to declare one sleeve better. Why is this conclusion weak?
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Keep the original threshold for judging these results and explain any proposed revision separately.