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NO.1 Refer to the exhibit:
The box plot was used to analyze daily sales data
following three different ad campaigns.
The business analyst concludes that
one of the assumptions of ANOVA was violated.
Which assumption has been
violated and why?
A. Constant variance, because Prob > F < .0001.
B.
Normality, because Prob > F < .0001.
C. Normality, because the
interquartile ranges are different in different ad campaigns.
D. Constant
variance, because the interquartile ranges are different in different ad
campaigns.
Answer: D
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O.2 What is the default method in the LOGISTIC procedure to
handle observations with missing
data?
A. Parameter estimates are made on
all available data.
B. Missing values are imputed.
C. Parameters are
estimated accounting for the missing values.
D. Only cases with variables
that are fully populated are used.
Answer: D
NO.3 In partitioning data for model assessment, which sampling methods are acceptable? (Choose
two.)
A. Stratified random sampling without replacement
B.
Sequential random sampling with replacement
C. Simple random sampling with
replacement
D. Simple random sampling without replacement
Answer:
A,D
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NO.4 Suppose training data are oversampled in the event
group to make the number of events and
nonevents
roughly equal. A logistic
regression is run and the probabilities are output to a data set
NEW and
given the variable name PE. A decision rule considered is, "Classify data as an
event if
probability is greater than 0.5." Also the data set NEW contains a
variable TG that indicates
whether there is an event (1=Event, 0= No
event).
The following SAS program was used.
What does this program
calculate?
A. Depth
B. Positive predictive value
C. Sensitivity
D.
Specificity
Answer: C
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