Give the accurate answers

Question 1

In a data set containing 300 private companies, two of the variables are “Size of Legal Department” and “Size of Marketing Department.” These two variables have a correlation of 0.62.Why do you think this strong positive correlation exists?

Question 2

Download the HomePrices.csv file, and import it into RStudio. Store it in an object called HomePrices. Then use the following line of code to produce summary statistics for the houses in the dataset:


Question 4

What is an example of a setting in which you think applying k-means clustering to a large data set would be helpful? How would it help?

Question 5

The gap method will select k=1 for the Employees data set, because it won’t be able to find groupings that are distinct enough from one another. Try it instead on a built-in data set in R called “iris.” The data set contains physical measurements for different species of irises.


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