BBH 440: CHAPTER NINE EXAM
QUESTIONS AND ANSWERS 100%
PASS
sample - CORRECT ANSWER--a subset of items that have been taken form the
population
statistical inferences - CORRECT ANSWER--refers to a conclusion about a
population based on sampled data
-95% confident tat the true rate is between a lower and upper limit
confidence interval - CORRECT ANSWER--a range of reasonable values in which
population parameter lies, based on a random sample from the population
-can be callused by any statistical measure from a sample
-this range contains the mean of a sample
-if a 95% CI overlaps 1, the P value will be greater than 0.05
p-value - CORRECT ANSWER--if is less than .05, then here is sufficient evidence
to reject the null hypothesis
, when is a confidence interval for odds ratio, risk ratio, or rate ratio statistically
significant - CORRECT ANSWER--if it does not overlap 1 since 1 means no
association
type 1 errors - CORRECT ANSWER--occurs when H null is rejected, but it is
actually true
-the probability of this happening is determined by the significant level of the test
represented by alpha
Type 2 errors - CORRECT ANSWER--occurs when H null is not rejected, but it is
false
-the probability of this happening is denoted by Beta
-used for a power of a test hypothesis
power of a test hypothesis - CORRECT ANSWER--1-Beta
-this is the probably of rejecting H null when H null is false (type 2 error)
-can be thought of as the chance that given study will detect a deviation from the
null hypothesis when one really exists
bias - CORRECT ANSWER--involves the deviation of the results from the truth
-can explain all or part of an observed association between exposure and outcome
variables
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED
QUESTIONS AND ANSWERS 100%
PASS
sample - CORRECT ANSWER--a subset of items that have been taken form the
population
statistical inferences - CORRECT ANSWER--refers to a conclusion about a
population based on sampled data
-95% confident tat the true rate is between a lower and upper limit
confidence interval - CORRECT ANSWER--a range of reasonable values in which
population parameter lies, based on a random sample from the population
-can be callused by any statistical measure from a sample
-this range contains the mean of a sample
-if a 95% CI overlaps 1, the P value will be greater than 0.05
p-value - CORRECT ANSWER--if is less than .05, then here is sufficient evidence
to reject the null hypothesis
, when is a confidence interval for odds ratio, risk ratio, or rate ratio statistically
significant - CORRECT ANSWER--if it does not overlap 1 since 1 means no
association
type 1 errors - CORRECT ANSWER--occurs when H null is rejected, but it is
actually true
-the probability of this happening is determined by the significant level of the test
represented by alpha
Type 2 errors - CORRECT ANSWER--occurs when H null is not rejected, but it is
false
-the probability of this happening is denoted by Beta
-used for a power of a test hypothesis
power of a test hypothesis - CORRECT ANSWER--1-Beta
-this is the probably of rejecting H null when H null is false (type 2 error)
-can be thought of as the chance that given study will detect a deviation from the
null hypothesis when one really exists
bias - CORRECT ANSWER--involves the deviation of the results from the truth
-can explain all or part of an observed association between exposure and outcome
variables
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED
