Deck 5: Data and Epidemiology: the Link to Biostatistics

Question 1

The nurse is preparing to perform research about patient satisfaction for healthcare in a clinical setting. Which descriptive statistic does the nurse recognize as the most important variable?

A) Third-party payers
B) Patient's gender
C) Address zip code
D) Financial income

Answer 1

B

Question 2

The nurse is sorting information for a clinical unit study into levels of measurement. Which question is anticipated to provide nominal measurement variables?

A) "Can you share your experience on the unit?"
B) "Which healthcare personnel provided direct care?"
C) "Did everyone assigned to you introduce themselves?"
D) "What suggestions do you have to improve the quality of care?"

Answer 2

C

Question 3

The nurse is gathering evaluation information using a scale with responses from 1 (excellent) to 5 (very poor). Which characteristic of the scale is correct?

A) The raters will understand the meaning of each level.
B) The intervals between the different levels is equal.
C) The level of measurement is considered interval level.
D) The results provide a sense of high or low response.

Answer 3

D

Question 4

The nurse is planning to statistically measure if a specific change in staffing has changed the data related to patient satisfaction. Which action by the nurse is helpful in determining if the change has an impact?

A) Set up multiple hypotheses for measurement
B) Determine if the data suggests rejection of the null hypothesis
C) Resume previous protocol due to hypothesis rejection
D) Refine the change in an attempt to retain the null hypothesis

Question 5

The public health nurse is determining the incidence rate of influenza in a specific county for a period of four months. Which calculation yields correct information?

A) The number of new cases is subtracted from the population at risk.
B) The number of new cases is multiplied by the previous year's cases.
C) The number of new cases is divided by the average population at risk.
D) The number of new cases is added to previous cases and divided by two.

Question 6

Researchers can convert variables from interval or ratio levels of measurement to the lower levels of ordinal or nominal but cannot change data collected at the ordinal or nominal levels to interval or ratio.

Question 7

A Type II error will occur if the null hypothesis was true and instead of retaining the null, the researchers reject it.

Question 8

A prevalence rate refers to the proportion of people in a population who have a particular event or disease at a certain point in time or over a certain period of time.

Question 9

If a variable implies a rank or order, then the variable is considered _______ level.

Question 10

With ___________ statistics, researchers are extrapolating the results of a study from a carefully selected sample to the entire population of interest.