Solution Manual For Introductory Statistics Exploring the World Through Data, Canadian Edition, 1st edition Robert N. Gould Colleen Ryan Jim Stallard Michelle Boué Chapters 1-14
Chapter 1: Introduction to Data SECTION 1.2 1.1
a. b.
The variable ―Handedness‖ is a categorical variable since its values are categories: ―Left‖ or ―Right.‖ The variable ―Age‖ is a numerical variable since its values are quantities.
1.2
a. b.
The variable ―Shoe size‖ is a numerical variable since its values are quantities. The variable ―Eye colour‖ is a categorical variable since its values are categories such as ―Blue‖ or ―Brown.‖
1.3
Persons who have responded that they are male have been coded with a ―1,‖ and the others are coded with a ―0.‖ Since these are categories, the variable ―Male‖ is categorical. Yes, summing the ―Male‖ categorical variable makes sense; doing so gives the total number of persons who classified themselves as males.
1.4
We use a ―1‖ for full-time students, and for those who are not are classified as full-time, we use ―0.‖ Credits
5 4 1.5 5.5 6 3 2.5 3 5 2.5 4.5 1.5
a. b. c.
Full 1 1 0 1 1 0 0 0 1 0 1
The data are presented in a stacked format. Smokers are indicated by ―1‖ and nonsmokers are indicated by ―0.‖ The table shows the data presented in an unstacked format. Smoker 15 14 13 23
Nonsmoker 18 23 19 21 18 15