Data Analysis Quiz

Which is the correct statement?

• A scatter plot displays 2-D data points using cartesian coordinates

• A scatter plot matrix can handle higher dimensionality effectively

• A scatter plot matrix become less effective as the dimensionality increases

• A third dimension can be added using different colors or shapes to represent same data points

__________ is the process of extracting smaller segments out of one image with the intent of identifying different parts/objects within an image.

• Grouping

• Regression

• Prediction

• Segmentation

The process of removing sub nodes of a decision node is called as __________.

• Splitting

• Merging

• Pruning

• Classification

____________________ component describes random, irregular influences.

• Seasonal

• Trend

• Noise

• None

A ______________ is a table with two rows and two columns that reports the number of false positives, false negatives, true positives, and true negatives.

• Table of Confusion

• Table Matrix

• Confusion Matrix

• Negative Matrix

____________ occurs when a model begins to memorize training data rather than learning to generalize from trend.

Answer explanation

Overfitting occurs when a model begins to memorize training data rather than learning to generalize from trends. This leads to poor performance on unseen data, as the model fails to adapt to new patterns.

STL in time series method stands for _____________________

Answer explanation

STL in time series stands for Seasonal-Trend decomposition using Loess. It is a method used to decompose a time series into seasonal, trend, and residual components, helping to analyze and forecast data effectively.

______________is the graphical representation of information and data.

Answer explanation

The correct answer is 'Data visualization'. It refers to the graphical representation of information and data, making complex data more accessible and understandable through visual formats like charts and graphs.

Stick figures have_______ limbs and ______ body.

Answer explanation

Stick figures have four limbs (two arms and two legs) and a simple body structure, typically represented as a circle for the head and a line for the torso.

______________ can be defined as the deviation of forecast or prediction from the actual results.

Answer explanation

The correct term is 'forecast error', which quantifies the difference between predicted values and actual outcomes, highlighting the accuracy of predictions.