Quartiles and Its Uses || Lesson 17 || Probability & Statistics || Learning Monkey || скачать в хорошем качестве

Quartiles and Its Uses || Lesson 17 || Probability & Statistics || Learning Monkey ||

Quartiles and its Uses In this class, We discuss Quartiles and their Uses. The reader should have prior knowledge of the measure of central tendency. Click Here. Quartiles: Quartiles are three points that divide the data series into four equal parts. Example: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 Total, we have n observations. n = 12 in our example Q1, Q2, and Q3 are quartile points. The three points, Q1, Q2, and Q3, divide the data into four equal parts. Q1 is our first quartile point. 25% of the data is left of the quartile value. Q2 is our second quartile. 50% of the data is left in the quartile Q2. Q2 is called the median quartile. Q1 is called the lower quartile. Q3 is called the upper quartile. Q1 = ((n +1)/4)th observation Q2 = ((n +1)/2)th observation Q3 = (3(n +1)/4)th observation Use of quartile points Simply finding the measure of central tendency will not help much in data analysis. The quartile points help in a deeper understanding of data. Example: Marks in a class 45, 46, 47, 48, 52, 55, 59, 62, 68, 69 The quartiles help to identify poor students and good students Quartile points in a symmetric distribution The below diagram shows the symmetric distribution This graphical intuition helps readers to understand the next classes. Quartiles in asymmetric distribution. The below diagram shows the asymmetric distribution. The data before the lower quartile are below the poverty line. The data after the upper quartile are rich. Link for playlists:    / @wisdomerscse   Link for our website: https://learningmonkey.in Follow us on Facebook @   / learningmonkey   Follow us on Instagram @   / learningmonkey1   Follow us on Twitter @   / _learningmonkey   Mail us @ learningmonkey01@gmail.com