Question

Chapter 2, Section 3, Exercise 109 Public Expenditure on Education The figure below shows the public expenditure on education as percentage of Gross Domestic Product (GDP) for all countries. 1 The mean expenditure is μ and the standard deviation of the expenditures is σ = 2%. The data are stored in EducationLiteracy 4.7% 10 12 1Data from The World Bank, the most recent data available for each country as of July 2015 obtained from knoema.com (a) The United States spends 5.2% of it's GDP on education. Without doing any calculations yet, will the z-score for the US be positive, negative, or zero? Negative Positive

Answer 1

a) positive as value is greater then the mean

b)z score =(5.2-4.7)/2=0.25

c)

range =maximum -minimum=13-0.8=12.2

d)

IQR =Q3-Q1=5.6-3.2=2.4