BST 322 BST322 Quiz 3 Solution (National University)

Product Description
 This is the measure of strength of relationship most commonly used with a 2X2 table.
 Chi square test for independence compares observed frequencies with:
 Nonparametric tests may be run when the assumptions for parametric tests cannot be met.
 A researcher wants to determine if blocked heparin lock (yes or no) is related to the occurrence of subsequent complications (yes or no). The ChiSquare null hypothesis for this study is that a blocked heparin lock leads to complications.
 The formula for ____________Â Â Â is (Rtotal X Ctotal)/N
 This is used when the expected cell frequency in a 2X2 table is less than 5
 Expected frequencies are the number of cases that would be found in each cell if the null hypothesis were true.
 This is used when a conservative approach is desired and an expected cell frequency is less than 10 in a 2X2 table
 Generally, tests for ordinal variables involve ranking in some way
 Parametric tests can be used with any type of data
 If the ChiSquare statistic is less than the table value, we accept the null hypothesis.
 The distribution of chisquare values is normally distributed
 The test statistic calculated in the process of a KruskallWallis test is H
 Parametric tests can be used with any type of data as the dependent variable (i.e., nominal, ordinal, interval, etc.).
 This is analogous to the ttest, when the independent variable is ordinal
 This can be thought of as the chisquare type equivalent to the paired ttest.
 Nonparametric tests are more powerful than parametric tests
 Chisquare tests can only be conducted for a 2X2 contingency table
 Nonparametric tests do not require that variables be normally distributed.
 The degrees of freedom for a 3X4 contingency table are: