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b/AWS/quizes/Chapter4_Quizes.json |
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[ |
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{ |
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"question": "The following descriptive statistics included in a box plot:", |
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"type": "many_choice", |
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"shuffle_answers": true, |
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"answers": [ |
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{ |
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"answer": "median", |
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"correct": true, |
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"feedback": "Correct." |
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}, |
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{ |
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"answer": "mean", |
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"correct": false, |
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"feedback": "Incorrect." |
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}, |
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{ |
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"answer": "mode", |
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"correct": false, |
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"feedback": "Incorrect." |
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}, |
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{ |
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"answer": "minimum value", |
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"correct": true, |
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"feedback": "Correct." |
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}, |
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{ |
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"answer": "maximum value", |
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"correct": true, |
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"feedback": "Correct." |
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}, |
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{ |
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"answer": "standard deviation", |
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"correct": false, |
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"feedback": "Incorrect." |
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}, |
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{ |
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"answer": "outlier values", |
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"correct": true, |
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"feedback": "Correct." |
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} |
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] |
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}, |
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{ |
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"question": "The following are dimensionality reduction methods:", |
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"type": "many_choice", |
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"shuffle_answers": true, |
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"answers": [ |
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{ |
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"answer": "heatmap", |
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"correct": false, |
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"feedback": "Incorrect." |
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}, |
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{ |
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"answer": "box plot", |
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"correct": false, |
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"feedback": "Incorrect." |
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}, |
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{ |
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"answer": "principle components analysis", |
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"correct": true, |
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"feedback": "Correct." |
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}, |
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{ |
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"answer": "tSNE", |
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"correct": true, |
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"feedback": "Correct." |
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}, |
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{ |
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"answer": "k-means clustering", |
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"correct": false, |
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"feedback": "Incorrect." |
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}, |
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{ |
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"answer": "factor analysis", |
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"correct": true, |
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"feedback": "Correct." |
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} |
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] |
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}, |
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{ |
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"question": "The following are properties of PCA", |
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"type": "many_choice", |
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"shuffle_answers": true, |
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"answers": [ |
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{ |
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"answer": "principle components represent the mean values of each cluster.", |
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"correct": false, |
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"feedback": "Incorrect." |
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}, |
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{ |
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"answer": "principle components represent decreasing levels of variance in the data.", |
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"correct": true, |
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"feedback": "Correct." |
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}, |
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{ |
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"answer": "principle components are linear combinations of the observed variables.", |
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"correct": true, |
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"feedback": "Correct." |
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}, |
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{ |
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"answer": "principle components are nonlinear combinations of the observed variables.", |
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"correct": false, |
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"feedback": "Incorrect." |
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}, |
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{ |
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"answer": "the transformed data points in a PCA plot have biological meaning.", |
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"correct": false, |
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"feedback": "Incorrect." |
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}, |
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{ |
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"answer": "all of the principle components are necessary for data visualization.", |
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"correct": false, |
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"feedback": "Incorrect." |
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} |
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] |
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}, |
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{ |
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"question": "In k-means clustering:", |
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"type": "many_choice", |
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"shuffle_answers": true, |
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"answers": [ |
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{ |
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"answer": "the centroid has no meaning.", |
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"correct": false, |
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"feedback": "Incorrect." |
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}, |
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{ |
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"answer": "the centroid represents the mean of a cluster.", |
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"correct": true, |
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"feedback": "Correct." |
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}, |
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{ |
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"answer": "all clusters share the same centroid.", |
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"correct": false, |
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"feedback": "Incorrect." |
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}, |
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{ |
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"answer": "the number of clusters are determined by the algorithm.", |
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"correct": false, |
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"feedback": "Incorrect." |
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}, |
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{ |
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"answer": "the number of optimal clusters can be determined by an elbow plot.", |
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"correct": true, |
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"feedback": "Correct." |
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}, |
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{ |
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"answer": "uses hierarchical clustering for the first iteration.", |
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"correct": false, |
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"feedback": "Incorrect." |
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} |
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] |
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} |
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] |