Question: Recommending Courses. We again consider the data in CourseTopics.csv describing course purchases at Statistics.com (see Problem 14.2 and data sample in Table 14.14). We want

Recommending Courses. We again consider the data in CourseTopics.csv describing course purchases at Statistics.com (see Problem 14.2 and data sample in Table 14.14).

We want to provide a course recommendation to a student who purchased the Regression and Forecast courses. Apply user-based collaborative filtering to the data. You will get a Null matrix. Explain why this happens.

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