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Exam 4: Data Analysis and Visualization

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Question 21

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Which of the following is true about hypothesis testing?

A) answering yes/no questions about the data
B) estimating numerical characteristics of the data
C) describing associations within the data
D) modeling relationships within the data

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Question 22

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Which of the following is a reasonable way to select the number of principal components "k"?

A) Choose k to be the smallest value so that at least 99% of the varinace is retained.
B) Choose k to be 99% of m (k = 0.99*m, rounded to the nearest integer) .
C) Choose k to be the largest value so that 99% of the variance is retained.
D) Use the elbow method.

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Question 23

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Which of the following is false?

How many layers Deep learning algorithms are constructed?

File containing R scripts end with extension _______.

Which of the following is a subset of machine learning?

Which is used to inference for 1 proportion using normal approx?

Which of the following is not a major data analysis approaches?

According to analysts, for what can traditional IT systems provide a foundation when they're integrated with big data technologies like Hadoop?