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Here is a population of scores: 10, 9, 7, 7, 7, 6, 6, 5, 5, 5 A) What is the proportion of X = 9?  B) What is the 90th percentile?

Here is a population of scores: 10, 9, 7, 7, 7, 6, 6, 5, 5, 5 A) What is the proportion of X = 9?  B) What is the 90th percentile?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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Here is a population of scores: 10, 9, 7, 7, 7, 6, 6, 5, 5, 5

A) What is the proportion of X = 9? 

B) What is the 90th percentile?

Expert Solution
Introduction

The percentile helps to understand the performance of score over other scores. It divides the entire data into 100 equal parts. It is defined as Pi, and the percentile ranges from 1 to 99. Where 50th percentile is known as median.

It is denoted as in+1100, where n is the number of observation and i is the percentile count. 

 

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