ерке 2

Give the following dataset. Let be given an object F with the following features: X1 = 0, X2 = 0. Then in the case when k = 3, F relates to the class:

• Class C
• Class D
• Class A
• Class B

Which of the following tasks are classification tasks?

• 1. assessment of the borrower's creditworthiness

• 1. determination of the most appropriate method of treatment;

• 1. determining the outcome of the disease;

• 1. problem of search output

What is True about sigmoid function?

• 1. Range is (-∞,∞)

• 1. Range is (0,1)

• 1. Domain is (0,1)

• 1. Range is {0,1}

In the classification table below, how many mistakes are made when participants are predicted to be female?   

• 6

• 4

• 32

• 57

The following dataset will be used to learn a decision tree for predicting whether a person is happy (H) or sad(S) based on the colour of their shoes, whether they wear a wig and the number of ears they have.

• Use a neural network to learn the decision tree
• Use a machine learning algorithm like ID3 or C4.5 to learn a decision tree based on the dataset.
• Use a support vector machine to learn the decision tree
• Use a linear regression model to learn the decision tree

Which attribute would the decision tree building algorithm choose to use for the root of the tree?

• 1. Color

• 1. Wig

• 1. Num. Ears

Which is true? K-Means __________

• 1. is independent of distances

• 1. detects the final number of clusters by itself

• 1. is a slow but precise algorithm

• 1. relies on random initialization

Agglomerative clustering repeatedly merge ____

• 1. with lowest variance

• 1. clusters with highest accuracy

• 1. standard-scaled clusters

• 1. clusters with lowest distance

62. What is meant by "hard" clustering?

• 1. When each data point is put in one and only one cluster.

• 1. When some values cannot be assigned to a unique cluster.

• 1. When each data point is put in one or more cluster.

• 1. Clustering problems that require NP-complete algorithms.

The correlation between the number of years an employee has worked for a company and the salary of the employee is 0.75. What can be said about employee salary and years worked?

Individuals that have worked for the company the longest have higher salaries.

• 1. There is no relationship between salary and years worked.

• 1. Individuals that have worked for the company the longest have lower salaries.

• 1. The majority of employees have been with the company a long time.

• 1. The majority of employees have been with the company a short period of time