1.
What is the difference between a bar chart and a column chart?
A bar chart displays bars horizontally, while a column chart displays bars vertically
A column chart displays bars horizontally, while a bar chart displays bars vertically
Bar charts and column charts are the same thing
Bar charts are used for categorical data, while column charts are used for numerical data
2.
What is the purpose of data aggregation?
To summarize data at a higher level of granularity, such as calculating totals, averages, or counts
To visualize the distribution of a single numerical variable
To determine the relationship between two categorical variables
To predict the value of a continuous variable
3.
What is the difference between a parameter and a statistic?
A parameter is a numerical characteristic of a population, while a statistic is a numerical characteristic of a sample
A statistic is a numerical characteristic of a population, while a parameter is a numerical characteristic of a sample
Parameters and statistics are the same thing
Parameters are used for quantitative data, while statistics are used for qualitative data
4.
Which of the following is a qualitative data type?
Age
Height
Color
Weight
5.
In data modeling, what does ER stand for in ER diagrams?
Entity Relationship
Effective Range
Error Ratio
Estimated Results
6.
Which of the following is a common data visualization tool?
Microsoft Word
Tableau
Notepad
Excel (only)
7.
What is the difference between a mean, median, and mode?
The mean is the average value, the median is the middle value when the data is ordered, and the mode is the most frequent value
The median is the average value, the mean is the middle value when the data is ordered, and the mode is the most frequent value
The mode is the average value, the mean is the middle value when the data is ordered, and the median is the most frequent value
The mean, median, and mode are the same thing
8.
Which term describes a data point that occurs most frequently in a dataset?
Median
Mode
Mean
Range
9.
In the context of data analysis, what does "data visualization" refer to?
The process of collecting data
The graphical representation of data to identify trends and insights
The storage of data in databases
The cleaning of data for accuracy
10.
Which of the following is an example of unstructured data?
Customer transaction records
Database tables
Social media posts
Excel spreadsheets
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