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Understanding K-Means Clustering

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Questions and Answers

What is the purpose of Descriptive Statistics?

To transform data to extract patterns (correct)

To visualize data in 3D

To predict future data points

To estimate data outliers

Which of the following is NOT a measure of Central Tendency?

Median

Mean

Mode

Variance (correct)

What does the Median represent?

The value that splits the data in half (correct)

The value with the highest weight

The most frequently occurring value

The average of all values

What is the purpose of Dimensionality Reduction in data analysis?

To reduce the number of attributes/features while preserving important information Signup and view all the answers

What does skewness indicate about a dataset?

If a dataset is right-skewed, left-skewed, or normally distributed Signup and view all the answers

How are outliers typically identified in a dataset?

Values above the 3rd quartile + 1.5 times the interquartile range Signup and view all the answers

Which statistical concept helps us understand the linear relationship between attributes?

Correlation Signup and view all the answers

What does Pearson's r value signify when it comes to correlation?

A value of 0 indicates no correlation between attributes Signup and view all the answers

Which attribute is used to describe the central tendency of categories?

Mode Signup and view all the answers

What is an effective way to measure the spread or dispersion of data?

A combination of variance, standard deviation, and ranges Signup and view all the answers