Biostatistics Final Actual Exam Questions and CORRECT Answers
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Course
Biostatistics
Institution
Biostatistics
Biostatistics Final Actual Exam Questions
and CORRECT Answers
Sampling error - CORRECT ANSWER- chance difference between an estimate and the
population parameter being estimated
Bias - CORRECT ANSWER- systematic discrepancy between estimates and the true
population characteristic
Random sa...
Biostatistics Final Actual Exam Questions
and CORRECT Answers
Sampling error - CORRECT ANSWER✔✔- chance difference between an estimate and the
population parameter being estimated
Bias - CORRECT ANSWER✔✔- systematic discrepancy between estimates and the true
population characteristic
Random sample - CORRECT ANSWER✔✔- each member of a population has an equal and
independent chance of being selected
categorical data - CORRECT ANSWER✔✔- named characteristics of individuals that do not
have magnitude on a numerical scale
numerical - CORRECT ANSWER✔✔- quantitative measurements that have magnitude on a
numerical scale
nominal categorical - CORRECT ANSWER✔✔- no order
ordinal categorical - CORRECT ANSWER✔✔- have order
Percentile - CORRECT ANSWER✔✔- specifies the percentage of observations less than or
equal to it; the remaining observations exceed it
contingency table - CORRECT ANSWER✔✔- gives the frequency of occurrence of all
combinations of two or more categorical variables
sample mean - CORRECT ANSWER✔✔- average of the measurements in the sample, the
sum of all the observations divided by number of observations
, standard deviation - CORRECT ANSWER✔✔- commonly used measure of the spread of a
distribution; measures how far from the mean the observations typically are
standard deviation - CORRECT ANSWER✔✔- measures how far from the mean the
observations typically are
variance - CORRECT ANSWER✔✔- measure of spread; standard deviation is the square
root of the variance
A box plot is especially useful when comparing - CORRECT ANSWER✔✔- more than one
distribution
The ______ (mean or median) is the middle measurement of a distribution. - CORRECT
ANSWER✔✔- median
The______ (mean or median) is the center of gravity - CORRECT ANSWER✔✔- mean
The ______ (standard deviation or IQR) is a better indicator of the spread of the main part of
a distribution than the standard deviation when the data are strongly skewed to one side or the
other, especially when there are extreme observations - CORRECT ANSWER✔✔-
Interquartile range
The ______ (std or IQR) is a better indication of the spread among all of the data points -
CORRECT ANSWER✔✔- standard deviation
Mutually Exclusive - CORRECT ANSWER✔✔- when two events are not simultaneously
possible; Pr[A and B]=0
probability distribution - CORRECT ANSWER✔✔- a list of the probabilities of all mutually
exclusive outcomes of a random trial
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