Data Science Program Quiz 3

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Data Science Program Quiz 3

Data Science Quiz 3

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1. Which statistical measure is best suited for understanding the spread of a dataset?

Median

Mean

Standard Deviation

Mode

2. What is the primary purpose of Exploratory Data Analysis (EDA)?

To optimize database queries

To preprocess data for storage

To develop machine learning models

To summarize data characteristics and detect patterns

3. Which of the following would be most effective in identifying anomalies in a dataset?

Histograms

Box plots

Bar charts

Pie charts

4. Which visualization technique is commonly used for analyzing correlations between variables?

Line chart

Scatter plot

Pie chart

Box plot

5. Which Python library provides the most flexibility for creating interactive visualizations?

Scikit-learn

Plotly

Matplotlib

Seaborn

6. When visualizing a dataset with many numerical variables, which method is best for detecting patterns?

Pairplot in Seaborn

Pie chart

Line graph

Stacked bar chart

7. Which of the following is a disadvantage of using mean as a central tendency measure?

It cannot be used for numerical data

It is not used in data visualization

It is always greater than the median

It is affected by outliers

8. Which of the following tools is commonly used for creating interactive dashboards?

Power BI

NumPy

Pandas

Scikit-learn

9. Which visualization type is best suited for tracking trends over time?

Scatter plot

Line chart

Histogram

Box plot

10. What does a right-skewed distribution indicate about a dataset?

There are no outliers in the data

The mean is less than the median

Most data points are concentrated on the right

The mean is greater than the median

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