Question
Additional structure in this type of data allows for ordinal, interval, and ratio measurements rather than just nominal measurements. For 10 points each:
[10m] Name this type of data in which each observation takes on one of a fixed number of discrete possible values.
ANSWER: categorical data [prompt on qualitative data]
[10e] Categorical data can be visualized with the “contingency” type of these structures, which display observation counts at each combination of variable levels. The “pivot” type of these grid structures is common in spreadsheets.
ANSWER: tables [accept contingency table or pivot table]
[10h] In the chi-squared test for independence between two categorical variables in an n-by-m contingency table, this quantity equals n-minus-one times m-minus-one. In a t-test, this quantity is one less than the sample size.
ANSWER: degrees of freedom [or df; prompt on nu]
<Science - Other Science>
Summary
| 2023 ACF Fall (Rutgers) | 10/14/2023 | Y | 5 | 20.00 | 100% | 20% | 80% |
Data
| Columbia A | Rutgers | 10 | 10 | 10 | 30 |
| Swarthmore A | NYU A | 0 | 10 | 10 | 20 |
| Swarthmore B | NYU B | 0 | 10 | 0 | 10 |
| Penn | University of Delaware A | 0 | 10 | 10 | 20 |
| Columbia B | University of Delaware B | 0 | 10 | 10 | 20 |