Statistics
A group of researchers want to know the characteristics of their sample e.g. class, gender, age, etc. What type of statistic can be used to gather this information from a study database?
Descriptive Statistics
This type of quantitative research adheres strictly on the procedures of the scientific method and it involves manipulation of variables and employment of a treatment or intervention.
Experimental Research
What is the term for the manipulator, cause, and influencer
Independent Variable
You want to determine if chocolate enhances mood. Subjects will be recruited and randomly assigned to a control group who will eat their regular diet and to an experimental group who will also east their usually meals and have one piece of chocolate at breakfast, lunch and dinner. At the end of the week both groups will complete the ACME mood scale. Which is the null hypothesis?
HO: Eating one piece of chocolate for breakfast, lunch and dinner over the course of the week does enhance mood.
HO: Eating one piece of chocolate for breakfast, lunch and dinner over the course of the week does not enhance mood.
HO: Eating one piece of chocolate for breakfast, lunch and dinner over the course of the week does not enhance mood.
You are a member of a committee that wants to reorganize the accudose so that it is easier to gather medications needed for intubation. Is this a quality improvement project, evidence-based practice project or a research study?
Quality improvemnt
What is the score that appears most frequently in a list of scores?
The mode
This type of quantitative research does not use treatment or intervention, no control selection, and no random assignment.
Nonexperimental Research
Examine the following hypothesis:
Changing the temperature setting on the thermostat up and down will cause the room temperature where the thermostat is located to change in the same way.
What is the independent and dependent variables?
IV: Thermostat setting
DV: Room temperature
This component of research helps you identify the variables you want to investigate and the relationships between these variables.
Research problem
You are a member of a team that is wanting to implement a best practice bundle to reduce the number of CAUTIs on the service line. Is this an example of quality improvement, evidence-based practice or a research study?
Evidence-based Practice
T-tests are used to compare________________?
Groups or means
A positive relationship is an association where one variable ________ as the other variable ________.
increases; increases
What are the characteristics of the nominal level of measurement?
-lowest level
-no natural order
-number have no meaning, simply label to differentiate objects
Prior to a heart health presentation, you administer a survey asking participants to indicate how many times they used the stairs as opposed to the elevator in the past week. A week after the presentation you resurvey the attendees. What is the research (alternative) hypothesis?
What is the dependent variable?
The heart health presentation will change elevator/stair usage.
DV: Elevator/stair usage
You are part of a team that is exploring the risk factors related to the development of pressure injuries in ICU patients. Is this an example of quality improvement, evidnece-based practice or a research study?
Research study
Categories without order such as male/female or religious preference are what level of measurement?
Nominal
Compare and contrast true experimental research and quasi-experimental research?
TRUE EXPERIMENTAL RESEARCH
-rigid manipulation of variables, use of control selection, and random assignment of participants
QUASI-EXPERIMENTAL RESEARCH
-may or may not include rigid manipulation of variables, may or may not include controls and there is no random assignment of participants
The following is an example of _______:
-test in school
-temperature (Celsius or Fahrenheit)
-elevation
-time
Interval
You are analyzing the survey results for the heart health presentation. The attendees were surveyed before the presentation and then one week after about their elevator/stair usage.
What type statistical test would be used to analyze the results?
Paired t-test
You are auditing patient medical records to determine if the nurses are measuring the pressure injuries correctly. Is this an example of quality improvement, evidence-based practice or research?
quality improvement
Which statistical test is used when there are two experimental conditions and different participants assigned to each condition?
An independent samples t-test
Examine the following study:
THE EFFECTS OF COOPERATIVE LEARNING ON STUDENTS’ ACADEMIC ACHIEVEMENT GRADE 12 STUDENTS
This study becomes a pure experimental research if researchers:
-manipulate variables, assign experimental and control group, and apply random assignment of participants
The value that indicates if the results have statistical significance or not.
p-value usually set at 0.05
You are analyzing the survey results for the heart health presentation. The attendees were surveyed before the presentation and then one week after about their elevator/stair usage.
The result is a p-value of 0.028. Which is the correct statement regarding the rejection or not rejecting the null hypothesis?
Since the p-value is 0.028 we reject the null hypothesis. Therefore, there is evidence to support that the difference between the surveys is statistically significant.
Since the p-value is 0.028 we do not reject the null hypothesis. Therefore, there is evidence to support that the difference between the surveys is statistically significant.
Since the p-value is 0.028 we reject the null hypothesis. Therefore, there is evidence to support that the difference between the surveys is statistically significant.
What is an example of a quality improvement method?
What is an example of an evidence-based practice model?
QI: PDCA, PDSA, lean six sigma
EBP: Stetler Model, Iowa Model, Johns Hopkins Model