POPM 3240 Final Exam Review
Questions And Correct Answers 2026.
Outcome for logistic regression - Answer Dichotomous
Outcome for linear regression - Answer Linear
Incidence risk - Answer Proportion of unaffected individuals who on average will develop the
disease of interest over a specified time period
Prevalence is a function of what - Answer Incidence and duration
Factors that increase prevalence - Answer Incidence
Factors that decrease prevalence - Answer Cures and deaths
Type 1 error - Answer Error of rejecting null when it is true (false claim)
Alpha - Answer probability of a type 1 error
Type II error - Answer Error of failing to reject the null when false (missed opportunity)
Beta - Answer Probability of a type II error
Power - Answer Ability of study to detect differences between groups when a real difference
exists
Power equation - Answer 1 - beta
P value - Answer probability that a test statistic would be as large, or larger, than observed if
the null hypothesis is true
Sensitivity - Answer Proportion of diseased individuals that test positive or the probability that
a truly diseased individual will test positive
Sn - Answer a / (a+c)
, False negatives - Answer 1-Sn = false negative fraction
False negative fraction - Answer % of false negatives you can expect with a test
SnOUT - Answer Highly sensitive test + negative result = can be confidence in ruling the
disease out
Specificity - Answer Proportion of non-diseased individuals that test negative or the
probability that a truly disease-free person will test negative
Sp - Answer d/(b+d)
What does Sn tell you - Answer False negatives
What does Sp tell you - Answer False positives
SpIN - Answer If test is highly specific and get positive test, can be confidence in ruling the
disease in
PPV - Answer Proportion of test positives that are truly diseased (P(D+|T+))
Given a positive test, what is the probability that the individual is truly diseased? - Answer PPV
NPV - Answer Proportion of test negatives that are truly disease free (P(D-|T-))
Given a negative test, what is the probability that they are truly disease-free? - Answer NPV
Series - Answer + on both
- on just one
Increase Sp, decrease Sn
Fewer false +, more false -
Parallel - Answer + on just one
- on both
Increase Sn, decrease Sp
Questions And Correct Answers 2026.
Outcome for logistic regression - Answer Dichotomous
Outcome for linear regression - Answer Linear
Incidence risk - Answer Proportion of unaffected individuals who on average will develop the
disease of interest over a specified time period
Prevalence is a function of what - Answer Incidence and duration
Factors that increase prevalence - Answer Incidence
Factors that decrease prevalence - Answer Cures and deaths
Type 1 error - Answer Error of rejecting null when it is true (false claim)
Alpha - Answer probability of a type 1 error
Type II error - Answer Error of failing to reject the null when false (missed opportunity)
Beta - Answer Probability of a type II error
Power - Answer Ability of study to detect differences between groups when a real difference
exists
Power equation - Answer 1 - beta
P value - Answer probability that a test statistic would be as large, or larger, than observed if
the null hypothesis is true
Sensitivity - Answer Proportion of diseased individuals that test positive or the probability that
a truly diseased individual will test positive
Sn - Answer a / (a+c)
, False negatives - Answer 1-Sn = false negative fraction
False negative fraction - Answer % of false negatives you can expect with a test
SnOUT - Answer Highly sensitive test + negative result = can be confidence in ruling the
disease out
Specificity - Answer Proportion of non-diseased individuals that test negative or the
probability that a truly disease-free person will test negative
Sp - Answer d/(b+d)
What does Sn tell you - Answer False negatives
What does Sp tell you - Answer False positives
SpIN - Answer If test is highly specific and get positive test, can be confidence in ruling the
disease in
PPV - Answer Proportion of test positives that are truly diseased (P(D+|T+))
Given a positive test, what is the probability that the individual is truly diseased? - Answer PPV
NPV - Answer Proportion of test negatives that are truly disease free (P(D-|T-))
Given a negative test, what is the probability that they are truly disease-free? - Answer NPV
Series - Answer + on both
- on just one
Increase Sp, decrease Sn
Fewer false +, more false -
Parallel - Answer + on just one
- on both
Increase Sn, decrease Sp
