Introduction to statistics–scales of measurement | Mock Test | Staff Nurse | Guides Academy

Introduction to statistics–scales of measurement  | Mock Test | Staff Nurse | Guides Academy

Introduction to statistics–scales of measurement, frequency distribution, mean, median, mode and standard deviation, utilization of research in nursing practice.


Time: 15:00
The process of synthesizing the best scientific evidence with clinical expertise and patient preferences to make clinical decisions is known as:
[a] The nursing process.
[b] Research utilization.
[c] Evidence-Based Practice (EBP).
[d] Quality improvement.
A nurse records a patient's marital status as "Single," "Married," or "Divorced." This type of data is measured on which scale?
[a] Nominal.
[b] Ordinal.
[c] Interval.
[d] Ratio.
What is the arithmetic average of a set of numerical data called?
[a] Median.
[b] Mode.
[c] Range.
[d] Mean.
A patient satisfaction survey asks patients to rate their care as "Excellent," "Good," "Fair," or "Poor." This is an example of which scale of measurement?
[a] Nominal.
[b] Ordinal.
[c] Interval.
[d] Ratio.
A nurse is analyzing the following patient temperature readings: 37.0, 37.5, 38.0, 38.0, 39.0. Which value represents the mode?
[a] 37.0
[b] 37.9
[c] 38.0
[d] 39.0
What does a small standard deviation indicate about a set of data?
[a] The average of the data is also small.
[b] The data points are widely spread out from the average.
[c] The data points are clustered closely around the average.
[d] There are very few data points in the set.
Which measure of central tendency is most affected by a single extremely high or low value (an outlier) in a dataset?
[a] Median.
[b] Mean.
[c] Mode.
[d] Range.
A table that lists each value in a dataset and the number of times it occurs is called a:
[a] Mean distribution.
[b] Frequency distribution.
[c] Standard deviation table.
[d] Sample summary.
A nurse measures a patient's height in centimeters and weight in kilograms. These measurements are on a ratio scale because they:
[a] Can be ranked in order.
[b] Belong to distinct categories.
[c] Have equal intervals between values.
[d] Have an absolute zero point.
A staff nurse reads a research article on a new method for preventing pressure ulcers and implements it for their patients. This is a direct example of:
[a] Quality improvement.
[b] The nursing process.
[c] Research utilization.
[d] Primary research.
What is the median of the following set of patient lengths of stay (in days): [4, 2, 8, 5, 10]?
[a] 2
[b] 8
[c] 5
[d] 5.8
Temperature measured in Fahrenheit or Celsius is an example of which scale of measurement?
[a] Nominal.
[b] Ordinal.
[c] Interval.
[d] Ratio.
The primary goal of utilizing nursing research findings in clinical practice is to:
[a] Lower the cost of healthcare.
[b] Improve patient outcomes.
[c] Increase nurse satisfaction.
[d] Standardize all nursing procedures.
The standard deviation is a measure of:
[a] Central tendency.
[b] The most common value.
[c] The middle point of the data.
[d] Variability or spread of the data.
Which of the following is an essential role for a staff nurse in promoting EBP on a hospital unit?
[a] Conducting independent research studies.
[b] Analyzing complex statistical data.
[c] Questioning current practices and seeking evidence to support clinical decisions.
[d] Securing funding for research projects.
What is the middle value in a dataset that has been ranked from lowest to highest?
[a] The mean.
[b] The median.
[c] The mode.
[d] The standard deviation.
To calculate a meaningful mean (average), what is the minimum level of measurement required for the data?
[a] Nominal.
[b] Ordinal.
[c] Interval.
[d] Categorical.
Descriptive statistics are used to:
[a] Predict the outcome of a disease.
[b] Prove a cause-and-effect relationship.
[c] Summarize and describe the main features of a sample.
[d] Test a research hypothesis.
A study reports that the mean age of patients is 65 with a standard deviation of 15 years. This indicates:
[a] All patients in the study were between 50 and 80 years old.
[b] The most common age was 65.
[c] There is a wide variation in the ages of the patients.
[d] The study sample was very small.
Which of the following represents the most frequent score in a dataset?
[a] The mean.
[b] The median.
[c] The mode.
[d] The range.
When data is presented in a normal distribution (a "bell curve"), the mean, median, and mode are:
[a] All located at different points.
[b] All located at the same central point.
[c] Not able to be calculated.
[d] Spread out across the curve.
A staff nurse who understands basic statistics is better able to:
[a] Diagnose medical conditions.
[b] Prescribe medications.
[c] Critically appraise research articles for their credibility and usefulness.
[d] Perform advanced surgical procedures.
A nurse records a patient's pulse rate (beats per minute). This is an example of which scale of measurement?
[a] Nominal.
[b] Ordinal.
[c] Interval.
[d] Ratio.
The PICO format is a tool used in EBP to help a nurse:
[a] Analyze statistical data.
[b] Document patient care.
[c] Obtain informed consent.
[d] Formulate a searchable clinical question.
If a study on patient recovery times shows a large standard deviation, it means that:
[a] All patients recovered at about the same time.
[b] The recovery times for patients varied greatly.
[c] The average recovery time was very long.
[d] The study's results are not valid.

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