1.
What is the difference between structured and unstructured data?
Structured data is organized in a predefined format, while unstructured data has no predefined format
Unstructured data is organized in a predefined format, while structured data has no predefined format
Structured data is always numerical, while unstructured data is always textual
Unstructured data is always numerical, while structured data is always textual
2.
Which programming language is commonly used for statistical analysis and data visualization?
Java
Python
HTML
C++
3.
Which of the following best defines the purpose of hypothesis testing in data analysis?
To determine the correlation between two variables
To confirm the null hypothesis is true
To draw conclusions about a population based on sample data
To find missing values in a dataset
4.
What is the purpose of using a control group in experiments?
To increase sample size
To provide a baseline for comparison with the experimental group
To ensure random sampling
To eliminate bias in data collection
5.
What is the purpose of a scatter plot matrix?
To visualize the relationship between multiple pairs of numerical variables simultaneously
To visualize the distribution of a single numerical variable
To predict the value of a continuous variable
To identify clusters of data points
6.
In which scenario would you use logistic regression?
Predicting continuous values
Classifying data into categories
Finding missing data
Summarizing the distribution of a variable
7.
Which of the following is a common measure of central tendency in data analysis?
Variance
Standard deviation
Median
Range
8.
What is the purpose of data normalization?
To protect sensitive data from unauthorized access
To scale data to a common range to improve model performance
To store the actual data values in a database
To develop marketing strategies based on customer data
9.
Which of the following is a key benefit of using data visualization?
It increases data storage requirements
It simplifies complex data and makes it easier to understand
It eliminates the need for data analysis
It guarantees accurate predictions
10.
In data analytics, which chart type is best suited for showing the distribution of a single variable?
Bar chart
Pie chart
Histogram
Line chart
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