Search questions
Choose which content to search, then combine terms with AND or OR.
Class 9 · Science · Expert
→A hypothesis allows two possible outcomes but both are treated as confirming it. What should change for scientific testing?
Class 9 · Science · Expert
→A scientific conclusion claims an effect applies to all humans although the study involved only healthy adults. What problem does this illustrate?
Class 9 · Science · Expert
→A result was obtained in several independent laboratories but all used the same faulty instrument model. What caution is necessary?
Class 9 · Science · Expert
→If an experimental conclusion is based on a difference smaller than the instrument's least measurable division what is the main problem?
Class 9 · Science · Expert
→A model makes very accurate predictions but its internal process may differ from the real system. Which conclusion is appropriate?
Class 9 · Science · Expert
→Only the treatment group showed improvement in a study of an intervention. Why is the conclusion weak without a control group?
Class 9 · Science · Expert
→Agreement about a scientific claim is growing but some experts disagree. Which conclusion is appropriate?
Class 9 · Science · Expert
→Not every possible influencing factor can be controlled in an experiment. What should the scientist do?
Class 9 · Science · Expert
→Why does confidence increase when a scientific claim is supported by several independent types of evidence rather than one type alone?
Class 9 · Science · Expert
→If an observer knows the expected result and records ambiguous measurements in that direction what is this?
Class 9 · Science · Expert
→Why should a scientific report describe the method in enough detail for another researcher to repeat it?
Class 9 · Science · Expert
→A researcher performed many possible analyses and published only the most impressive result. What is the main problem?
Class 9 · Science · Expert
→If two groups have the same average but one has much more spread what would be missed by looking only at the average?
Class 9 · Science · Expert
→Why do random sampling and random assignment serve different purposes in an experiment?
Class 9 · Science · Expert
→An experiment was designed to test causation but participants chose their own groups. What is the main risk?
Class 9 · Science · Expert
→Results were obtained only in a tightly controlled laboratory. The possibility that they may not occur in real life relates to which limitation?
Class 9 · Science · Expert
→A survey question is worded so that one answer appears more reasonable. Which bias may mainly arise?
Class 9 · Science · Expert
→The same result was obtained repeatedly by the same experimenter but not by other groups. Which quality is present while another is doubtful?
Class 9 · Science · Expert
→A study measured treatment benefit only through self-reported feelings. What addition would most strengthen the conclusion?
Class 9 · Science · Expert
→