# 3022HW1 - Solutions to Homework 1 Problem 1.17 1 The total...

• Notes
• 2

This preview shows pages 1–2. Sign up to view the full content.

Solutions to Homework 1 January 21, 2010 Problem 1.17 1. The total number of people who responded to the survey is 232. 1-18 10 232 4.3% 19-24 97 232 41.8% 25-35 70 232 30.1% 36-50 36 232 15.5% 51-69 14 232 6.0% 70 and Over 5 232 2.2% 2. > X<-c(4.3,41.8,30.1,15.5,6.0,2.2) > barplot(X,xlab="Age Group",ylab="Percent") Age Group Percent 0 10 20 30 40 3. The distribution is unimodal and skewed to the right. 1

This preview has intentionally blurred sections. Sign up to view the full version.

4. Histograms must have equal size ”bins”, in this case the groups must have the same width Problem 1.21 1. Alaska is 5.7%, and Flordia is 17.6%. 2. The distribution is roughly symmetric or can be considered slightly skewed left, centered near 13%. Ignoring the outliers, the percentages are spread
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: from 8.5% to 15.6%. Problem 1.26 The distribution is skewed to the right, meaning that Skahkespeare’s plays contain more short words than long words. We would probably expect most authors to hold the same trend. Problem 1.37 Graph (a) is studytime, you can expect most people to study very little, which would cause the skew to the right. Graph (d) is the student heights, which has more variation but has no skew. Graph (b) is the graph about handedness, which we would expect because of pervious studies on the subject. Which leaves graph (c) to the the gender graph. 2...
View Full Document

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern