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BCPS ACCP Study Materials QUESTIONS & CORRECT 100%

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  • BCPS ACCP

Types of random variables - ANSWER discrete and continuous discrete - values are limited (nominal and ordinal) continuous - values are not (interval and ratio) Discrete Variable - ANSWER Can only be limited number of values within a given range Nominal and ordinal data Discrete Variab...

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  • September 26, 2024
  • 25
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • bcps accp
  • BCPS ACCP
  • BCPS ACCP
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BCPS ACCP Study Materials QUESTIONS
& CORRECT 100%

Types of random variables - ANSWER discrete and continuous


discrete - values are limited (nominal and ordinal)
continuous - values are not (interval and ratio)


Discrete Variable - ANSWER Can only be limited number of values within a given
range


Nominal and ordinal data


Discrete Variable Subtypes - ANSWER 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 - ANSWER type of discrete data that is classified into groups that are
not ordered or ranked (yes/no; gender; race; etc.)


Ordinal data - ANSWER 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 - ANSWER can be any value within a given range and
numbers are ranked


subtypes: interval and ratio


Interval data - ANSWER type of continuous variable - numbers are ranked


Zero is arbitrary (in ratio zero is significant)




Percentile Interpretation - ANSWER 75th percentile = 75% of all values in set are
smaller than that data point


it does NOT assume normal distribution


Distribution of percetiles - ANSWER can be any; normal is not assumed


Interquartile range - ANSWER Middle 50% of the data set (25-75% percentiles)


Kolmogorov-Smirnov test - ANSWER a statistical test of normal distribution


this is the formal way to decide but it should be easy to see when data is shown
on histogram

, Standard error of the mean - ANSWER Quantifies uncertainty in the estimate of
the mean (does not quantify variability of the sample)


SD/square root of sample size


95% CI = +/- 2x SEM


95% CI Calculation - ANSWER Plus or minus 2x the SEM


SEM = SD / square root of sample size


What do p-values tell us? - ANSWER If there is a difference between groups but
not how big that difference is (CI's tell us more about magnitude of difference)


Do you need to show both p-value and CI? - ANSWER Nope


Rejecting and not rejecting null hypothesis meaning - ANSWER Rejecting: there is
a statistical difference between groups


Not rejected: no statistical difference; but not saying that the groups are equal


Hypothesis Test for non-directional difference between groups - ANSWER 2-sided
t-test or confidence intervals

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