BST 322 Final Exam Latest Updated

This is used when a conservative approach is desired and an expected cell frequency is less than 5 in a 2X2 table. - Answer Fisher's exact test It is important to assess the magnitude or strength of a relationship because this assists you with deciding whether or not a variable A causes variable B. True or False - Answer False A Z score of +/-1.96 is equivalent to these values on a normal distribution. - Answer +/-2 standard deviations When examining the relationship between two interval or ration level variables, you can use a scatterplot to allow you to visualize the relationship between the two. True or False - Answer True This term refers to how data spreads out or disperses within a distribution. - Answer Variability A perfect negative relationship between two variables is expressed as r=0. True or False - Answer False The arithmetic average of the data is called the: - Answer Mean Public Health nurses want to compare the mean weight of US 6th graders to a sample of 6th graders in one school. Which statistical test is most appropriate - Answer One sample t-test Psych nurses wanted to evaluate the effect of three different treatments for anxiety - positive imagery, therapeutic touch, and medication on anxiety score (interval data) while controlling for the effect of length of stay. Which test is most appropriate? - Answer ANCOVA Data which uses numbers to provide categories or labels as well as the ordering of the categories are: - Answer Ordinal When examining the relationship between a nominal variable and an interval or ratio 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 using the mode and median. True or False - Answer False Chi-square tests can be conducted for a 4X3 contingency table. True or False - Answer True Generally, an ANOVA test is used when 3 or more variables are compared. True or False - Answer False In a negative relationship, as the score of one variable decreases, the score on the second variable decreases. True or False - Answer False This is the measurement of dispersion equal to the square root of the mathematical variance. - Answer Standard deviation