This node calculates the Maximum Likelihood Estimate (MLE) Odds Ratio (OR) and the Maximum Likelihood Estimate (MLE) Risk Ratio (RR), i.e., "Wald" OR and RR, from two selected categorical columns. For each column a value is selected to be considered the value under observation. All other values in non-binary categorical columns are considered as the "not" case.

X | ¬ X | |
---|---|---|

Y | a | b |

¬ Y | c | d |

Odds Ratio:

OR = (a/b) / (c/d) = (a * d) / (b * c)

Risk Ratio:

RR = (a / (a+b)) / (c / (c+d))

**Fisher's Exact Test** is calculated with

p = (a + b)!(c + d)!(a + c)!(b + d)! / (a!b!c!d!n!), where

n = a + b + c + d

over the sum of the marginal tables.

The two-tailed, left-tailed, and right-tailed p-values are calculated. The value for the Laplace correction is not considered for this calculation.

The **Chi-Squared Test** (**Χ**^{2}) is calculated with

Χ^{2} = ∑_{i} ∑_{j} (O_{ij} - E_{ij})^{2} / E_{ij}^{2}

where

E_{ij} = T_{i} * T_{j}/n

and

T_{i} and T_{j} are the sums of the row and columns respectively.

**Yates' Corrected Χ**^{2} is

Χ^{2}_{Yates} = ∑_{i} ∑_{j} (|O_{ij} - E_{ij}|-0.5)^{2} / E_{ij}^{2}

**Pearson's Coefficient of Contingency**

Pearson's C = √Χ^{2} / (Χ^{2} + n)

**Cramér's Coefficient of Contingency**

Cramér's V = √Χ^{2}/n

- Column X
- The column to choose for the X variable.
- Column Y
- The column to choose for the Y variable.
- Value from Column X
- The value from the X variable to choose as the value to be examined.
- Value from Column Y
- The value from the Y variable to choose as the value to be examined.
- Confidence Interval
- The confidence interval to be calculated.
- Laplace Correction
- The amount of Laplace correction to use, if one of the values ({a,b,c,d}) is 0. This value is applied to all four entries in the contingency table.

- This node has no views

- No workflows found

- No links available

You want to see the source code for this node? Click the following button and we’ll use our super-powers to find it for you.

To use this node in KNIME, install the extension KNIME Statistics Nodes (Labs) from the below update site following our NodePit Product and Node Installation Guide:

v5.2

A zipped version of the software site can be downloaded here.

Deploy, schedule, execute, and monitor your KNIME workflows locally, in the cloud
or on-premises – with our brand new **NodePit Runner**.

Do you have feedback, questions, comments about NodePit, want to support this platform, or want your own nodes or workflows listed here as well? Do you think, the search results could be improved or something is missing? Then please get in touch! Alternatively, you can send us an email to mail@nodepit.com, follow @NodePit on Twitter or botsin.space/@nodepit on Mastodon.

**Please note that this is only about NodePit. We do not provide general support for KNIME — please use the KNIME forums instead.**