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Author Archives: Anonymous

An online retailer stores customers’ purchase histories and…

An online retailer stores customers’ purchase histories and preferences so it can personalize future offers and manage ongoing relationships. Which resource supports this approach?

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A customer is comparing competing products and considering a…

A customer is comparing competing products and considering a first trial. Which adoption-process stage should persuasive messages address for this customer?

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A company spends $30,000 on advertising and earns $1,000,000…

A company spends $30,000 on advertising and earns $1,000,000 in sales. What is its advertising-to-sales ratio?

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Lesson 2 Naïve Bayes   Choose the correct naïve assumptions…

Lesson 2 Naïve Bayes   Choose the correct naïve assumptions of the naïve Bayes model (Choose 2).

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Lesson 5   Why is the HDF5 format useful for handling big da…

Lesson 5   Why is the HDF5 format useful for handling big data? (Choose 2)

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Lesson 5 ARIMA Modeling   Which of steps is not part of the…

Lesson 5 ARIMA Modeling   Which of steps is not part of the process for setting up an optimal ARIMA modeling?

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Lesson 4 Not-so-naïve Bayes   When you develop a not-so-naïv…

Lesson 4 Not-so-naïve Bayes   When you develop a not-so-naïve Bayes model using KDE with a Gaussian kernel, which assumption of the naïve Bayes algorithm is rejected?

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Lesson 3 Python API’s   Which of the following is generally…

Lesson 3 Python API’s   Which of the following is generally easiest to use for extracting online data?

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Lesson 1 k-Nearest Neighbors   Let assume that a dataset con…

Lesson 1 k-Nearest Neighbors   Let assume that a dataset consists of 4 data points. The followings are the coordinates and the label of each data point:   Point A: (2, 4) / class 0 Point B: (0, 0) / class 1 Point C: (-1, 3) / class 0 Point D: (3, 2) / class 1   If you train a 1-NN model on this dataset, what would be the prediction for Point B?

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Lesson 2 Expectation-Maximization Models   Which of the foll…

Lesson 2 Expectation-Maximization Models   Which of the following is a common feature of k-means and Gaussian mixture model?

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