Test
Bus497
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Preguntas del test (18)
1Big Data can be defined by the following three aspects: [blank_start]volume[blank_end], [blank_start]velocity[blank_end], and [blank_start]variety[blank_end].
- Avolume
- Bvelocity
- Cvariety
2What are the thee types of business analytics techniques? [blank_start]Descriptive[blank_end] [blank_start]Predictive[blank_end] [blank_start]Prescriptive[blank_end]
- ADescriptive
- BPredictive
- CPrescriptive
3Information is a set of data that are organized and processed in a meaningful and purposeful way. (True or False?)
- AVerdadero
- BFalso
4A data transformation technique that converts numerical variables into categorical variables by grouping the numerical values into a small number of categories is called [blank_start]binning[blank_end].
- Abinning
5A dummy variable is also referred to as a/an [blank_start]binary[blank_end] variable.
- Abinary
6In R, we can create a dummy variable by using the [blank_start]ifelse[blank_end] function.
- Aifelse
7The two common strategies for handling missing data are: [blank_start]imputation[blank_end] and [blank_start]omission[blank_end].
- Aimputation
- Bomission
8Subsetting is the process of extracting parts of a data set that is of interest. (True or False?)
- AVerdadero
- BFalso
9We use the is.na function in R for subsetting. (True or False?)
- AVerdadero
- BFalso
10When working with numerical variables, the frequency distribution is equal to the number of observations that falls into each interval. (True / False)
- AVerdadero
- BFalso
11Constructing a contingency table allows for a clear visualization of the relationship between two categorical variables. (True / False)
- AVerdadero
- BFalso
12When we constructed a frequency distribution for a numerical variable, we group data into intervals and records the number of observations that falls into each interval. (True / False)
- AVerdadero
- BFalso
13What is R?
- AA programming language
- BA user interface
- CAn operating system
- DA variable
14What is RStudio?
- AA programming language
- BAn application with a user interface for writing R code
- CAn operating system
- DA variable
15We should always install R before RStudio (True or False?).
- AVerdadero
- BFalso
16Cross-Industry Standard Process for Data Mining (CRISP-DM) consists of six phases. Which of the following is NOT part of the CRISP-DM phases?
- ABusiness understanding
- BDeployment
- CData understanding
- DSystem acquisition
- EData preparation
17The Jaccard’s coefficient is appropriate when positive and negative outcomes in the data are equally important. (True / False)
- AVerdadero
- BFalso
18In a classification data mining model, the target variable is numerical. (True / False)
- AVerdadero
- BFalso
Información
- Descripción
- College Bus497 Test sobre Bus497, creado por Nicholas Thieme el 16/01/2021.
- Autor
- Nicholas Thieme
- Idioma
- English
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