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1D0-622 — Data Analyst
#Question
In data visualization, what aspect does the term 'visual encoding' refer to?
A.
The display medium
B.
The process of data entry
C.
The use of color and shape
D.
The way data is stored
Correct Answer:
C
Visual encoding refers to the use of various visual elements, such as color and shape, to represent data visually in graphs or charts.
#Question
How does conducting hypothesis testing contribute to data analysis?
A.
It collects data
B.
It validates assumptions
C.
It eliminates uncertainty
D.
It simplifies datasets
Correct Answer:
B
Hypothesis testing validates assumptions about the population based on sample data, helping derive conclusions about broader trends.
#Question
When would a data analyst utilize a bar graph?
A.
To visualize distributions
B.
To compare categories of data
C.
To plot relationships
D.
To show time series data
Correct Answer:
B
Bar graphs are effective for comparing different categories across a certain metric, clearly illustrating differences.
#Question
What is the significance of a sample's confidence interval?
A.
It measures sample size
B.
It shows raw data variance
C.
It provides a range of estimated values
D.
It indicates the final results
Correct Answer:
C
A confidence interval gives a range of values that likely contain a population parameter, indicating uncertainty in the estimate.
#Question
In data analysis, what does a 'heatmap' visually represent?
A.
Distribution of data
B.
Strength of relationships
C.
Frequency of an item
D.
Central tendency
Correct Answer:
B
Heatmaps use colors to visually represent the strength of relationships or data density in two dimensions.
#Question
Which of the following refers to a type of data that shows qualitative characteristics?
A.
Numerical data
B.
Categorical data
C.
Time series data
D.
Continuous data
Correct Answer:
B
Categorical data represents attributes or qualities, which can be divided into groups or categories.
#Question
What is the main objective of conducting a regression analysis?
A.
To summarize data
B.
To collect more data
C.
To visualize data
D.
To determine relationships between variables
Correct Answer:
D
Regression analysis aims to understand the relationships between independent and dependent variables.
1D0-622 — Data Analyst
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