IS 335 quiz2

Which characteristic of data requires that the variables and data values be defined at the lowest (or as low as required) level of detail for the intended use of the data? Group of answer choices data source reliability data accessibility data richness data granularity

data granularity

Key performance indicators (KPIs) are metrics typically used to measure database responsiveness. qualitative feedback. external results. internal results.

internal results.

Benefits of the latest visual analytics tools, such as SAS Visual Analytics, include all of the following EXCEPT mobile platforms such as the iPhone are supported by these products. it is easier to spot useful patterns and trends in the data. they explore massive amounts of data in hours, not days. there is less demand on IT departments for reports.

they explore massive amounts of data in hours, not days.

Contextual metadata for a dashboard includes all the following EXCEPT whether any high-value transactions that would skew the overall trends were rejected as a part of the loading process. which operating system is running the dashboard server software. whether the dashboard is presenting "fresh" or "stale" information. when the data warehouse was last refreshed.

which operating system is running the dashboard server software.

Which type of question does visual analytics seeks to answer? Why is it happening? What happened yesterday? What is happening today? When did it happen?

Why is it happening?

This measure of central tendency is the sum of all the values/observations divided by the number of observations in the data set. dispersion mode median arithmetic mean

arithmetic mean

Which characteristic of data means that all the required data elements are included in the data set? data source reliability data accessibility data richness data granularity

data richness

When you tell a story in a presentation, all of the following are true EXCEPT a story should make sense and order out of a lot of background noise. a well-told story should have no need for subsequent discussion. stories and their lessons should be easy to remember. the outcome and reasons for it should be clear at the end of your story.

a well-told story should have no need for subsequent discussion.

This technique makes no a priori assumption of whether one variable is dependent on the other(s) and is not concerned with the relationship between variables; instead it gives an estimate on the degree of association between the variables. regression correlation means test multiple regression

correlation

Which type of visualization tool can be very helpful when a data set contains location data? bar chart geographic map highlight table tree map

geographic map