20IT211 Data Science

Select the main purpose of data exploration. U/CO2

• To build machine learning models

• To identify patterns and insights in data

• To perform system testing

• To store data efficiently

Choose the best representation of a measure of central tendency in a dataset. U/CO2

• Variance
  
  

• Standard Deviation
  

• Mean

• Range

A_____ is an enhanced form of a simple scatterplot where more than two dimensions can be included in the chart and studied simultaneoulsy R/CO2

• scatter multiple

• Histogram

• Bar chart

• Scatter plot

What does a box plot NOT show? R/CO2

• Mean

• Median

• Outliers

• Interquartile range

Identify the limitation of visualizing more than three attributes on a two-dimensional medium. U/CO2

• Increased clarity

• Reduced need for dimensionality reduction
  

• Difficulty in capturing complex patterns
  

• Better layout control

A positively skewed distribution has___ . R/CO2

• 
  Mean > Median > Mode

• Mean < Median < Mode
  

• 
  Mean = Median = Mode

• Mean = Mode > Median

Calculate the Interquartile Range (IQR) for the dataset: [6, 7, 8, 9, 10, 11, 12, 13, 14] R/CO2

• 5

• 4

• 6

• 3

Select the option that indicates a distribution with heavy tails and a sharp peak. U/CO2

• Mesokurtic
  

• Platykurtic
  

• Leptokurtic
  

• Normal

In the dataset [2, 4, 6, 8, 10, 12, 14, 16], what is Q2 (median)? R/CO2

• 8

• 10

• 12

• 9

Choose the correct option that indicates the meaning of bubble size in a bubble chart. U/CO2

• X-Axis

• Time

• A third variable’s value

• Axis title