Inspect the standardized t-SNE plot with perplexity 30 and compare it with the standardized PCA plot. The app uses the diagnosis labels for colouring after calculating each projection.
Which statement about this comparison is justified?

Question

Inspect the standardized t-SNE plot with perplexity 30 and compare it with the standardized PCA plot. The app uses the diagnosis labels for colouring after calculating each projection. 
 Which statement about this comparison is justified?

Accepted Answer

The plots can be compared visually, but t-SNE has no directly corresponding PCA explained-variance percentage here, and visual separation alone is not evaluated prediction performance.

Answer

The two legend labels prove that t-SNE was instructed to find exactly two clusters.

Answer

The same diagnosis colours imply that PCA and t-SNE must preserve the same distances between samples.

Answer

A cleaner-looking t-SNE plot must retain more total variance than the PCA plot.

Crowdly

Inspect the standardized t-SNE plot with perplexity 30 and compare it with the s...

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