4 ms·
The school board member claimed that he "managed to guess ten out of the 60 correctly" Perhaps if he wasn't utterly innumerate, he could have realized that 10
by stouset 15y ago
The school board member claimed that he "managed to guess ten out of the 60 correctly"
Perhaps if he wasn't utterly innumerate, he could have realized that 10 out of 60 is one and a half standard deviations worse the expected value of selecting answers by chance. His understanding of math is so bad, he performed worse than he likely would have had he just answered questions randomly.
- blahedo 15y agoI thought the same thing, but it turns out the test is not all multiple choice---in the 2006 exam, 28 out of 58 problems were open answer, and the rest were 4-option multiple choice. So the expected value of a totally random selection would be 7.5 questions out of 58---meaning this guy was at least not doing worse than chance.
- transphenomenal 15y agoGetting 10 questions right may not be statistically more significant than just answering randomly. I would calculate this myself, but I'm going to bed, however, just eyeballing it makes me think this is quite possible.
- stouset 15y agoGood catch. Thanks.