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GEB 4522 Exam 2 UCF Questions with Correct Answe
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GEB 4522 Exam 2 UCF Questions with Correct Answe
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GEB 4522 Exam 2 UCF Questions with CorrectAnswers
Which of the following will help address data limitations? Correct
Answer-As you're gathering data, don't just tell people the data you
want, tell them what you're trying to do with it.
Which of the following is not a question that should be asked when
evaluating external data? Correct Answer-Does the data indicate the
correct solution to the problem?
"high quality data" from employee Correct Answer-doing the work
(conformance to standards)
"high quality data" from client Correct Answer-receiving the product
(fitness of use)
data relevance Correct Answer-does the data meet the basic needs for
which they were used? can the data be used for additional purposes?
data accuracy Correct Answer-what are likely to be the main variables of
interest? how accurate does our data have to be to predict outcomes?
data timeliness Correct Answer-how current does this information need
to be to predict...? how do delays effect the use of data?
,data comparability Correct Answer-is it appropriate to combine several
databases into a data warehouse to facilitate the data's use in 1)
exploratory analyses 2) modeling 3) statistical explanation
data completeness Correct Answer-no records are missing and that no
records have missing data elements
three ways of retaining high quality data Correct Answer-1) keep bad
data out of the database/ list
2) proactively look for bad data already entered
3) let the bad data find you and then fix it
three measures of central tendencies Correct Answer-mean, median,
mode
mean Correct Answer-one way to locate the center of a set of numbers
Which measure of central tendency is mostly affected by the impact of
outliers? Correct Answer-Mean
Which measure of central tendency minimizes the impact of outliers?
Correct Answer-Median
median Correct Answer-when you have a outlier, it won't throw
everything off
, mode Correct Answer-could possible have two
calculation of variance Correct Answer-1) subtract the mean from each
score (result is a standard deviation)
2) average the deviations (if the average is large we have variability)
3) if deviations have minus signs square them
4) the average of the squared deviations if variance
population Correct Answer-all members of a specific group
sample Correct Answer-a part of a population that is used to describe the
characteristics of the whole population
standard deviation Correct Answer-the square root of the average
squared deviation from the mean OR the distance a number is from the
mean
true Correct Answer-true or false: the square root of the variance is the
standard deviation
Which smooths out periodic peaks and valleys in a data? Correct
Answer-Moving average
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