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BST 322 Final Exam with precise detailed answers

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BST 322 Final Exam with precise detailed answers

Institution
BST 322
Course
BST 322

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BST 322 Final Exam with precise detailed ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\|||




answers


This is used when a conservative approach is desired and an expected cell frequency is less
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than 5 in a 2X2 table. - correct answer✔✔Fisher's exact test
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It is important to assess the magnitude or strength of a relationship because this assists you
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with deciding whether or not a variable A causes variable B.
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True or False - correct answer✔✔False ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\|||




A Z score of +/-1.96 is equivalent to these values on a normal distribution. - correct
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answer✔✔+/-2 standard deviations ||/|\||| ||/|\|||




When examining the relationship between two interval or ration level variables, you can use
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a scatterplot to allow you to visualize the relationship between the two.
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True or False - correct answer✔✔True ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\|||




This term refers to how data spreads out or disperses within a distribution. - correct
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answer✔✔Variability



A perfect negative relationship between two variables is expressed as r=0.
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True or False - correct answer✔✔False ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\|||




The arithmetic average of the data is called the: - correct answer✔✔Mean
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, Public Health nurses want to compare the mean weight of US 6th graders to a sample of 6th
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graders in one school. Which statistical test is most appropriate - correct answer✔✔One
||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\|||




sample t-test ||/|\|||




Psych nurses wanted to evaluate the effect of three different treatments for anxiety - positive
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imagery, therapeutic touch, and medication on anxiety score (interval data) while ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\|||




controlling for the effect of length of stay. Which test is most appropriate? - correct ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\|||




answer✔✔ANCOVA



Data which uses numbers to provide categories or labels as well as the ordering of the
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categories are: - correct answer✔✔Ordinal ||/|\||| ||/|\||| ||/|\||| ||/|\|||




When examining the relationship between a nominal variable and an interval or ratio
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variable, you would create a table using the nominal variables, calculate the mode and ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\|||




median of the interval or ratio variable, then make a decision regarding the relationship
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using the mode and median. ||/|\||| ||/|\||| ||/|\||| ||/|\|||




True or False - correct answer✔✔False
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Chi-square tests can be conducted for a 4X3 contingency table. ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\|||




True or False - correct answer✔✔True
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Generally, an ANOVA test is used when 3 or more variables are compared. ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\||| ||/|\|||




True or False - correct answer✔✔False
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In a negative relationship, as the score of one variable decreases, the score on the second
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variable decreases. ||/|\|||




True or False - correct answer✔✔False
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