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All 14 items are shown below.
What do you think? Isn't it possible that some of the items require more than a knowledge of mathematics?
Some of them also seem to require adequate reading skills -- if this were the case, we might say that the validity of some of the items could be questioned as they are not just maths items, students require reading abilities too.
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How to determine if these are good items?
We'll put test results into Excel and apply some basic measurement theory.
See you in the next topic.