Chi Square Test and Non-Parametric Analysis Quiz Answers

NATIONAL UNIVERSITY BST 322 QUIZ 3-with verified answers-2022 • Question 1 1 out of 1 points Chi square test for independence compares observed frequencies with: Selected Answer: Expected frequencies Correct Answer: Expected frequencies • Question 2 The degrees of freedom for a 3X4 contingency table are: Selected Answer: 6 Correct Answer: 6 • Question 3 1 out of 1 points 1 out of 1 points The formula for Selected Answer: Expected frequencies is (Rtotal X Ctotal)/N Correct Answer: Expected frequencies • Question 4 1 out of 1 points This is the measure of strength of relationship most commonly used with a 2X2 table. Selected Answer: ph i Correct Answer: ph i

• Question 5 1 out of 1 points

Non-parametric tests do not require that variables be normally distributed. Selected Answer: Correct Answer: Tru e Tru e • Question 6 1 out of 1 points Non-parametric tests may be run when the assumptions for parametric tests cannot be met. Selected Answer: Correct Answer: Tru e Tru e • Question 7 Non-parametric tests are more powerful than parametric tests. 1 out of 1 points Selected Answer: Correct Answer: Fals e Fals e • Question 8 1 out of 1 points This is used when a conservative approach is desired and an expected cell frequency is less than 10 in a 2X2 table. Selected Answer: Yates' correction Correct Answer: Yates' correction • Question 9 1 out of 1 points This is used when the expected cell frequency in a 2X2 table is less than 5. Selected Answer: Fisher's exact test Correct

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Answer: Fisher's exact

test • Question 10 1 out of 1 points This test is analogous to the t-test (independent groups), when the measurement of the dependent variable is ordinal. Selected Answer: Mann-Whitney U- test Correct Answer: Mann-Whitney U- test • Question 11 1 out of 1 points This can be thought of as the chi-square type equivalent to the paired t- test. Selected Answer: McNemar test Correct Answer: McNemar test • Question 12 1 out of 1 points Chi-square tests can only be conducted for a 2X2 contingency table. Selected Answer: Correct Answer: Fals e Fals e • Question 13 Parametric tests can be used with any type of data. 1 out of 1 points Selected Answer: Correct Answer: Fals e Fals e • Question 14 1 out of 1 points

The test statistic calculated in the process of a Kruskall-Wallis test is H. Selected Answer: Tru e

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Correct Answer: Tru e • Question 15 The distribution of chi-square values is normally distributed. 1 out of 1 points Selected Answer: Correct Answer: Fals e Fals e • Question 16 Generally, tests for ordinal variables involve ranking in some way. 1 out of 1 points Selected Answer: Correct Answer: Tru e Tru e • Question 17 1 out of 1 points A researcher wants to determine if blocked heparin lock (yes or no) is related to the occurrence of subsequent complications (yes or no). The Chi-Square null hypothesis for this study is that a blocked heparin lock leads to complications. Selected Answer: Correct Answer: Fals e Fals e • Question 18 1 out of 1 points Parametric tests can be used with any type of data as the dependent variable (i.e., nominal, ordinal, interval, etc.). Selected Answer: Correct Answer: Fals e Fals e

• Question 19 1 out of 1 points

If the Chi-Square statistic is less than the table value, we accept the null hypothesis. Selected Answer: Correct Answer: Tru e Tru e • Question 20 1 out of 1 points Expected frequencies are the number of cases that would be found in each cell if the null hypothesis were true. Selected Answer: Correct Answer: Tru e Tru e

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