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2. What is the variance of C2?______

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Assume you have the following set: [-6, -6, -4, -4, 2, 2, 2]. Consider the following two clusters: C1 = [2, 2, -6, -6] and C2 = [-4, -4, 2].1. What is the variance of C1?______

For the following question, check the boxes that correspond to the rules that we may be able to learn. Consider the following set of 6 emails, which classify the email as spam or not. Which of the following rules might we learn? Check all that apply.Spam or Not Spam? Spam Spam Spam Not spam Not spam Not spamWords in Email 4 4 30 35 50 10Flagged Words CASH, BUY, password cash, free, rolex cash free, call only, cancel, sign free, check, weight quote, cheap, website

A. Emails containing both flagged words "cash" and "free" are marked "spam".
B. Emails without the flagged word "free" are marked "not spam".
C. Emails with an even number of words are marked "spam".
D. Emails with less than 31 words are marked "spam".
Emails containing at least one flagged word in all capital letters are marked "spam".

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A school documents the age, grade, score on a math standardized test, and score on a writing standardized test for every student. A new student comes to the school and we want to decide what grade they should be placed in.

A. Supervised
B. Unsupervised

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Given a set of colored points on an x-y axis, we want to place a new point on the plot, knowing its color.

A. Supervised
B. Unsupervised

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