{"title":"Independent groups t-test","nodeType":"Manipulator","id":"*LfKWJOtOdNhm8JCj","factoryName":"org.knime.base.node.stats.testing.ttest.TwoSampleTTestNodeFactory","factoryId":"org.knime.base.node.stats.testing.ttest.TwoSampleTTestNodeFactory","path":["Analytics","Statistics","Hypothesis Testing"],"owner":"knime","ownerAccountId":"account:team:b5f0848f-496d-4e6a-b869-fa3532248db7","description":"<p>Computes statistics for the independent groups t-test, also know as the two sample t-test. It is designed to compare the means of observations in the same column between two groups. The node allows the testing of equality of variances (Levene&#39;s test) and the t-value for both equal- and unequal-variance. It also provides the relevant descriptive statistics.</p>\n        ","shortDescription":"This test is designed to compare the means of observations in the same column between two groups.","keywords":["ttest","t test"],"deprecated":false,"streamable":false,"tags":["Analytics","Statistics","Hypothesis Testing"],"icon":"data:image/png;base64,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","views":[{"name":"Test statistics","description":"Tables with descriptive statistics of the input columns and test statistics of the independent samples t-test."}],"inPorts":[{"objectClass":"org.knime.core.node.BufferedDataTable","color":"000000","dataType":"Table","optional":false,"name":"Data Table","description":"The Input"}],"outPorts":[{"objectClass":"org.knime.core.node.BufferedDataTable","color":"000000","dataType":"Table","optional":false,"name":"Independent groups t-test","description":"Statistics for the independent groups t-test."},{"objectClass":"org.knime.core.node.BufferedDataTable","color":"000000","dataType":"Table","optional":false,"name":"Levene-Test","description":"Statistics for the Levene-Test."},{"objectClass":"org.knime.core.node.BufferedDataTable","color":"000000","dataType":"Table","optional":false,"name":"Descriptive Statistics","description":"Descriptive statistics of the input."}],"dynInPorts":[],"dynOutPorts":[],"additionalSiteInformation":{"url":"https://update.knime.com/analytics-platform/5.12","trusted":true,"enabledByDefault":true,"name":"KNIME Analytics Platform 5.12 Update Site","version":"5.12.0"},"dialog":[{"sectionName":"Options","fields":[{"name":"Grouping column","description":"Column holding the grouping information data.","optional":false},{"name":"Group one","description":"All rows of the input table which have this this value in the grouping column are assigned to group one.","optional":false},{"name":"Group two","description":"All rows of the input table which have this this value in the grouping column are assigned to group two.","optional":false},{"name":"Confidence Interval (in %)","description":"The limits for the confidence interval are computed using this number. The default is 95 which means that you can be 95% confident that the true value of the parameter is in the confidence interval.","optional":false},{"name":"Test columns","description":"A independent groups t-test is performed separately for each of these columns.","optional":false}]}],"links":[],"kudos":[],"kudosCount":0,"bundleInformation":{"bundleVersion":"5.12.0.v202604281126","bundleName":"KNIME Statistic Nodes","bundleSymbolicName":"org.knime.stats","bundleVendor":"KNIME AG, Zurich, Switzerland","featureSymbolicName":"org.knime.features.stats","featureName":"KNIME Statistics Nodes","featureVersion":"5.12.0.v202604281126","featureVendor":"KNIME AG, Zurich, Switzerland","extensionId":"*G7WNikjPW2P03gXm"},"frequentSuccessors":[{"id":"*jd2U-FYTI8jCbQls","factoryName":"org.knime.base.node.preproc.filter.row.RowFilterNodeFactory","probability":0.13333333333333333},{"id":"*VU5C_Qbl6sDSPXjl","factoryName":"org.knime.base.node.flowvariable.tablecoltovariable.TableColumnToVariableNodeFactory","probability":0.05333333333333334},{"id":"*Oy714gpoifm4PiOZ","factoryName":"org.knime.base.node.io.csvwriter.CSVWriterNodeFactory","probability":0.05333333333333334},{"id":"*n3KemxSzYJ3CC2Od","factoryName":"org.knime.base.node.flowcontrol.trycatch.genericcatch.DataPortCatchNodeFactory","probability":0.05333333333333334},{"id":"*DOkyMaii62U05xZ1","factoryName":"org.knime.base.node.preproc.filter.column.DataColumnSpecFilterNodeFactory","probability":0.05333333333333334},{"id":"*ZgYyOm1P9VJVBE9e","factoryName":"org.knime.base.node.preproc.joiner.Joiner2NodeFactory","probability":0.04},{"id":"*GNkerKCgfvI8BZgj","factoryName":"org.knime.base.node.stats.testing.ttest.PairedTTestNodeFactory","probability":0.04},{"id":"*c6OQQSNaKDTUyDaP","factoryName":"org.knime.base.node.stats.testing.ttest.OneSampleTTestNodeFactory","probability":0.04},{"id":"*zpGPAjDyExkFL2HB","factoryName":"org.knime.base.node.rules.engine.RuleEngineNodeFactory","probability":0.02666666666666667},{"id":"*DBlot_cJykJ7wkzA","factoryName":"org.knime.base.node.preproc.filter.nominal.NominalValueRowFilterNodeFactory","probability":0.02666666666666667}]}