Your company recently introduced a new service, and you decide to conduct a survey among its 30 million users to get their feedback on the new service. Based on data mining techniques, which users will you survey?

Figure 1: Training Dataset for Car Ownership Instance Employed Insured Marital Status Car Ownership 1 Yes No Single Yes 2 Yes Yes Single No 3 No No Married Yes 4 No Yes Single Yes 5 Yes Yes Married No 6 No No Single No   Review the table labeled Figure 1: Training Dataset for Car Ownership. Assume we want to use a decision tree to predict if a person owns a car or not. Using entropy as the measure of node impurity, what is the information gain if the split is done on the attribute of being insured?

You have a dataset that contains information about different countries in the world. For each country, more than 20 attributes, such as population, area, weather, gross income, and so on, are available. What would NOT be a possible issue for learning models on this dataset?

A nurse is assessing a client for manifestations of Parkinson’s disease. Which of the following are expected findings? Select All That Apply.

You have a dataset of 7,500 signals, and you want to train a model to detect heart signals within the dataset. How would you validate the performance of your classifier?

When updating weights for a perceptron model, in which case would the weight need to decrease?

Which task describes a clustering data mining task?

How do we determine that a given data point is an outlier?

What is a disadvantage of utilizing decision tree models?

How do we determine that a given data point is a noise?