Statistical Methods in Nursing Research Exam Questions and Answers
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Course
Nursing research
Institution
Nursing Research
Pearson Product-Moment Correlation - Answers measures degree & direction of linear relationship between variables for association, not causation
Pearson Correlation strength - Answers <0.3=weak; 0.3-0.5=mod.; >0.5=strong
Regression Analysis - Answers to predict the value of one variable whe...
Regression Analysis - Answers to predict the value of one variable when value of one or more other
variables is known; develops "line of best fit"; outcome = R
T-Test - Answers examines difference between 2 groups; used with interval & ratio levels of
measurement
Chi-Square Test - Answers examines diff between 3+ groups; nominal & ordinal level data;
(X2[df] = 18.10, p = 0.001)
Chi-Square p=0.001 - Answers probability is 1 in 1000 these groups come from the same population, or,
these groups are significantly different
nominal scale - Answers lowest; no comparison, categories not orderable, are exclusive & exhaustive Ex:
different diagnoses
ordinal scale - Answers data can be ranked; categories exclusive & exhaustive; not known if diff between
intervals are equal Ex: pain scale
interval scale - Answers equal numeric distance between intervals; mutually exclusive, exhaustive
categories, rank ordering, no absolute zero Ex: temperature (C/F)
ratio scale - Answers highest form of measurement; same as interval, but has an absolute zero Ex:
weight, length, V, Kelvin
descriptive ("summary") statistics - Answers describe, summarize, reduce, and manage data-organize
into meaningful; help develop succinct info about data & help reader grasp the variables
data - Answers numerical results of the study
variable - Answers trait or characteristic being studied
sample - Answers subgroup of a population
population - Answers all subjects in a defined group
ungrouped data - Answers use on discrete data like gender, ethnicity, marital status
grouped data - Answers use on continuous variables like weight, temperature, etc.
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