To maintain prognostic balance before implementing the research study may include:

randomization & allocation concealment

Variability is measured via range, interquartile range (IQR), and standard deviation. What is interquartile range (IQR)?

the score at the 75% percentile minus the score at the 25th percentile

What is an example of sampling bias?

The population has 25% men and the sample as 10% men.

What is the formula for relative risk?

incidence in the exposed/incidence in the unexposed

RRR of 1.63 means what?

outcome occurred 1.63x more often in the exposed than the unexposed group

Inferential statistics describes

the use of sample data to infer a statement(s) about the population

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EBD Review 2 - 2022

15 termsStudBud Administration78 plays

Stats and validity and tests

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Questions 15

Answers

1
Central tendency is the average value in the sample. What is a measure of this?
Mode
Arithmetic Mean
All of the above
Median
2
To maintain prognostic balance before implementing the research study may include:
randomization & allocation concealment
acknowledging missing participant data
blinding
intention to treat analysis & Per protocol analysis
3
How do we control or reduce the effects of a potential confounding variable?
Homogeneity
All of the above
Include the study design
Repeated measures
4
See media below.
Both are considered the population
Group 1
Group 2
Neither are the population
5
Variability is measured via range, interquartile range (IQR), and standard deviation. What is interquartile range (IQR)?
the maximum value/score minus the minimum value/score
the score at the 75% percentile minus the score at the 25th percentile
average absolute distance of all scores in the distribution from the mean
the score between each of the quarters of total data
6
What is an example of sampling bias?
The population has 50% over age 50 and the sample as 50% over age 50.
The population has 25% men and the sample as 10% men.
The population has 25% men and the sample as 25% men.
The population has 30% over age 50 and the sample as 70% under age 50.
7
What is the formula for relative risk?
absolute risk in the unexposed/absolute risk in the nexposed
incidence in the exposed/incidence in the unexposed
incidence in the unexposed/incidence in the exposed
absolute risk in the exposed/absolute risk in the unexposed
8
RRR of 1.63 means what?
outcome occurred 1.63x more often in the exposed than the unexposed group
outcome occurred 1.63x less often in the exposed than the unexposed group
outcome did not occur 1.63x in all the groups observed
outcome occurred 1.63x more often in the unexposed than the exposed group
9
The degree to which results can be generalized to persons, settings, & time outside experimental conditions is called?
All of the above
external validity
general validity
internal validity
10
A study is going to measure the dependent variable using inches as the unit. What type of measurement metric is this?
interval
ordinal
nominal
ratio
11
What is one way to improve internal validity?
Retention, especially for longitudinal studies
Blinding
All of the above
Randomization
12
The probability that the COVID test for someone who is truly negative will yield a negative result is:
True Negative Test
specificity
sensitivity
both sensitivity and specificity
13
Descriptive statistics describes the:
data collected from the sample
differences between the sample and the population
data collected from the population
sample when compared to the population
14
A study is going to measure the dependent variable by assigning numbers to categories. What measurement metric is this?
ordinal
interval
ratio
nominal
15
Inferential statistics describes
the use of population data to infer a statement about the sample group
to infer the statistics of the population data
the use of sample data to infer a statement(s) about the population
the use of population to determine the makeup of the sample group

EBD Review 2 - 2022 Flashcards | StudBud