Learning Path
Question & Answer1
Understand Question2
Review Options3
Learn Explanation4
Explore TopicChoose the Best Answer
A
Select the features and preprocess the data
B
Determine the number of neighbors to consider
C
Use the nearest-neighbor algorithm to classify new data points
D
Evaluate the model's accuracy and performance
Understanding the Answer
Let's break down why this is correct
Answer
First, load the Iris dataset and split it into a training set and a test set. Then, for each test sample, compute the distance to every training sample using a chosen metric such as Euclidean distance. Next, identify the nearest training sample (or a set of nearest neighbors if using k‑NN) and assign the test sample the label of that nearest neighbor. Finally, evaluate the model by comparing the predicted labels to the true labels of the test set to measure accuracy. This sequence of loading, splitting, distance calculation, neighbor selection, and evaluation completes the nearest‑neighbor classification pipeline.
Detailed Explanation
First you pick the right measurements and clean the data so the model can learn. Other options are incorrect because People sometimes think you pick the neighbor count before cleaning data, but you need a clean set first; Running the algorithm before deciding how many neighbors to use skips a key decision.
Key Concepts
Classification Algorithms
Data Preprocessing
Model Evaluation
Topic
Iris Dataset
Difficulty
medium level question
Cognitive Level
understand
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