In the Apache Spark Machine Learning Case Study entitled “Titanic Survival Random Forest Model”, what were the features that were chosen to factor into the Random Forest predictive model prediction of whether or not someone survived the Titanic Iceberg Collision Disaster in the early 20th century?  Roughly speaking, how accurate was the model in its predictions using the Random Forest Machine Learning algorithm on the supervised learning dataset based on these features?

Scala Spark application’s main method consists of:

Which of the following is not a DataFrame transformation?

What is the probability a randomly selected student is male or has a Mac?

What is the probability less than 2 of the selected businesses will use an outside accounting firm for payroll?

The table below indicates color and size of a bowl of 100 marbles.  Color Small Large   Blue 30 10 40 Green 9 8 17 Red 15 5 20 Yellow 10 13 23 Total 64 36 100 total   Question: You select 3 marbles (without replacement) from the bowl. What is the probability you will end up with a blue marble, and a red marble, and then another blue marble? Show at least 2 non-zero digits after the decimal. Show as much work as possible.  

You are in Restorative Art I. True or False? ( This quiz is not for any points. It is for you to check and see if your camera works).

The next 3 questions use the following information. Show as much work as possible.Your company contracts with two vendors for new IT projects. 70% of new projects are awarded to vendor A, while 30% of new projects go to vendor B. Past experience shows that 20% of vendor A’s projects come in “over budget” (assume the rest are “within budget”). Conversely, only 10% of vendor B’s projects are “over budget.”Though it will not be graded, please draw a tree (on your scratch paper) describing the probabilities described above. Using the tree will make the next 3 questions much easier. Question: What is the probability a random project will be awarded to company A and be “over budget”?

The next 2 questions use the following information. Show as much work as possible. Suppose an internet service provider suffers internet outages at an average rate of 4 per month. Question:  What is the probability the company will have 3 outages in the next month?    

You plan to conduct an experiment regarding color preferences. Further, suppose 22% of college students prefer black cars. If you randomly select 20 college students and ask them what color car they drive, would this be a binomial experiment? Briefly explain why it would or would meet the binomial requirements.