G. H. RAISONI COLLEGE OF ENGG., NAGPUR
(An Autonomous Institute under UGC Act 1956)
Department of Computer Science & Engg.
Practical Subject: Data Analytics with R
Student Details:
Roll Number 28
Name Amritanshu Rajeev Diwakar
Semester 4
Section A
Batch A2
Practical Details: Practical Number-2
Practical
Aim
DESCRIPTIVE STATISTICS IN R
a. Write an R script to find basic descriptive statistics using summary, str,
quartile function on mtcars & cars datasets.
b. Write an R script to find subset of dataset by using subset (), aggregate ()
functions on iris dataset
Theory In Descriptive analysis, we are describing our data with the help of various
representative methods like using charts, graphs, tables, excel files, etc. In the
descriptive analysis, we describe our data in some manner and present it in a
meaningful way so that it can be easily understood.
Most of the time it is performed on small data sets and this analysis helps us a
lot to predict some future trends based on the current findings. Some
measures that are used to describe a data set are measures of central tendency
and measures of variability or dispersion.1
Process of Descriptive Analysis
The measure of central tendency:
Measure of variability
Measure of central tendency
It represents the whole set of data by a single value. It gives us the location of
central points. There are three main measures of central tendency:1
Mean
Mode
Median
