The head of the quality control department at a printing company would like to carry out an experiment to determine which of three different glues results in the greatest binding strength. Although they are not of interest in the current investigation, other factors thought to affect binding strength are the number of pages in the book and whether the book is being bound as a paperback or a hardback.

(a)What is the response variable in this experiment?

a. number of pages in the book

b. binding strength

c. paperback book or hardback book

d. types of glue

e. material of book

(b)What explanatory variable will determine the experimental conditions?

a. number of pages in the book

b. binding strength

c. paperback book or hardback book

d. types of glue

e. material of book

(c)What two extraneous variables are mentioned in the problem description? (Select all that apply.)

a. number of pages in the book

b. binding strength

c. paperback book or hardback book

d. types of glue

e. material of book

Are there other extraneous variables that should be considered? (Select all that apply.)

a. color of the book cover

b. type of paper used

c. subject matter of the book

d. weight of material used in the cover

e. dust jacket or no dust jacket