Page 190 - Artificial Intellegence_v2.0_Class_11
P. 190
139.45
=
6
= 23.24
Step 5: Now we will assemble the equation of a line:
y = mx + b
y = 17.17x + 23.24
Now you can use this equation to estimate the height of the child at 9 years.
y = 17.17 (9) + 23.24 = 177.77 cm
At a Glance
• A matrix (plural matrices) is a rectangular arrangement of numbers. The numbers are arranged in tabular
form as rows and columns.
• A matrix having m rows and n columns is called a matrix of order m × n.
• Matrices are used throughout the field of machine learning.
• The determinant is a scalar value that is a function of the entries of a square matrix.
• Matrix inversion is a process of finding another matrix that when multiplied with the original matrix, gives
an identity matrix.
• Vectors are the basis of linear algebra. Vectors are used in the training of machine learning algorithms.
• A vector is defined as a list of numbers in one-dimensional form.
• A set is an unordered collection of objects, known as elements or members of the set.
• A database is a collection of data.
• Relational algebra consists of eight operators: SELECT, PROJECT, JOIN, INTERSECT, UNION, DIFFERENCE,
PRODUCT, AND DIVIDE.
• A JOIN is used to combine rows from two or more tables.
• The mean is the average of all the values in a group of numbers.
• The median is the middle value in a given list of numbers arranged in ascending or descending order.
• The mode is the value that appears most often in a given list of numbers.
• Variance measures the distance of each number in the data set from the mean.
• Standard deviation is a statistic that measures the degree of dispersion of a data set relative to its average.
• Complex and voluminous data, if expressed visually, is better processed by the human brain.
• Linear regression shows the relationship between two variables by fitting a linear equation to the observed data.
• The line of best-fit is the line that passes close to most of the data points.
Exercise
Solved Questions
SECTION A (Objective Type Questions)
uiz
A. Tick ( ) the correct option.
1. Which one of the following is a rectangular arrangement of numbers?
a. Sets b. Matrix
c. Vector d. Scalar
188 Touchpad Artificial Intelligence (Ver. 2.0)-XI

