BCPS ACCP Study Materials questions & answers 2023

BCPS ACCP Study Materials questions & answers 2023Types of random variables discrete and continuous discrete - values are limited (nominal and ordinal) continuous - values are not (interval and ratio) Discrete Variable Can only be limited number of values within a given range Nominal and ordinal data 01:11 01:13 Discrete Variable Subtypes Nominal - classification into groups that are not ordered or ranked (yes/no; gender; race; etc.) Ordinal - classification into groups that are ranked or tied to severity Nominal data type of discrete data that is classified into groups that are not ordered or ranked (yes/no; gender; race; etc.) Ordinal data type of discrete data that is classified into groups that are ranked or tied to severity (pain scales, NYHA functional classifications, etc.) Means and standard deviations should not be used for this data (but often is) Continuous variables can be any value within a given range and numbers are ranked subtypes: interval and ratio Interval data type of continuous variable - numbers are ranked Zero is arbitrary (in ratio zero is significant) Ratio data type of continuous variable - numbers are ranked Zero is significant (in interval zero is arbitrary) Visual methods for descriptive statistics frequency distribution histogram scatter plot boxplot Type of data for means CONTINOUS data only and must be normally distributed; if lots of outliers can use median Median - also known as - types of data to be used AKA: the 50th percentile ordinal or continuous data Standard deviation - how to calculate - types of data to be used - percentages in each square root of variance - variance = average squared difference of each observation from the mean can only be used on continuous data that is normally distributed 1SD = 68% of population; 2SD = 95%; 3SD = 99%