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1. Data collection considerations - Correct Answer: 1. Select the right data
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2. Determine the time frame for data collection
3. How the data will be collected
4. How much data to collect
5. Choose data sources
6. Decide what data to use
2. Population - Correct Answer: All possible data values in a certain
dataset
3. Sample - Correct Answer: A part of the population that is representative
of the population
4. First-party data - Correct Answer: Data collected by an individual or
group using their own resources
,5. Second-party data - Correct Answer: Data collected by a group directly
from its audience and then sold
6. Third-party data - Correct Answer: Data collected from outside sources
who did not collect it directly
7. Internal data (Primary data) - Correct Answer: Collected by a researcher
from first-hand sources
8. External data (Secondary data) - Correct Answer: Gathered by other
people or from other research
9. Quantitative data - Correct Answer: Can be measured and counted
using numbers (quantity, amount, range)
10.Qualitative data - Correct Answer: Cannot be counted, measured or
easily expressed in numbers (names, categories, descriptions)
11.Discrete data - Correct Answer: Data that is counted and has a limited
number of values
12.Continuous data - Correct Answer: Data that is measured and can have
any numeric value
,13.Nominal data - Correct Answer: A type of qualitative data that is
categorized without a set order
14.Ordinal data - Correct Answer: A type of qualitative data with a set
order or scale
15.Structured data - Correct Answer: Data organized in a certain format
such as rows and columns
16.Unstructured data - Correct Answer: Data that is not organized in an
easily identifiable manner
17.Data model - Correct Answer: A model that is used for organizing data
elements and how they relate to one another
18.Data elements - Correct Answer: Pieces of information, such as
people's names, account numbers, and addresses
19.Data modeling - Correct Answer: The process of creating diagrams that
visually represent how data is organized and structured
20.Levels of data modeling - Correct Answer: 1. Conceptual modeling 2.
Logical data modeling 3. Physical data modeling
, 21.Physical data model - Correct Answer: Defines all entities and attributes
used.
22.Entity Relationship Diagram (ERD) - Correct Answer: Visual way to
understand the relationship between entities in the data model.
23.Unified Modeling Language (UML) - Correct Answer: Detailed diagrams
that describe the structure of a system by showing the system's entities,
attributes, operations, and their relationships.
24.Data type - Correct Answer: A specific kind of data attribute that tells
what kind of value that is.
25.Text or string - Correct Answer: A sequence of characters and
punctuation that contains textual information.
26.Boolean - Correct Answer: Data type with only two possible values:
true or false.
27.Operator - Correct Answer: A symbol that names the operation or
calculation to be performed.
28.AND operator - Correct Answer: Lets you stack both of your conditions.