Timeline for Statistical analysis of academic grades
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 7, 2023 at 14:56 | comment | added | whuber♦ | The initial paragraph is a poor recommendation due to its statistically unsupported assumption that these grades ought to be coded numerically using the values given. Simple, better methods abound. What is needed here is a more thoughtful analysis of how the differences among the grades should be quantified. | |
| Dec 7, 2023 at 12:10 | comment | added | Christian Hennig | That said I wouldn't worry too much about a t-test here (violations of distributional assumptions will normally be harmless but see my comment under the question); in a regression setup it's a different matter because of floor and ceiling effects. | |
| Dec 7, 2023 at 11:52 | comment | added | Christian Hennig | Wilcoxon/Mann-Whitney (which I guess is what you call U) with correction for ties keeps grades ordinal as well, i.e., it doesn't use information other than the order. | |
| Dec 7, 2023 at 11:37 | comment | added | Leonhard Euler | Both look like excellent suggestions. Many thanks. | |
| Dec 7, 2023 at 11:34 | history | answered | Peter Flom | CC BY-SA 4.0 |