Concept explainers
Reading Colored Paper (Example 4) Some people believe that it is easier to read words printed on colored paper than words printed on white paper. To test this theory, statistics student Paula Smith collected data. Subjects were timed as they read a pas-sage printed in black ink on a sheet of salmon-colored paper and as they read the same passage printed with black ink on a sheet of white paper. Each person was randomly assigned to read material printed on either the white or the salmon paper first. The times in seconds are given in the table. We are assuming that smaller times (faster reading) imply that the reading is easier. Assume that these are a random sample of times and that the distribution of times is sufficiently close to Normal for
a. Compare the sample means. Does your result fit the theory given?
b. Use a two-sample
c. Use a paired
d. Which is the appropriate test for this data set?
e. Why is it essential that the researchers randomly assign the order so that some of the people read material on the salmon-colored paper first and some read material on the white paper first?
Want to see the full answer?
Check out a sample textbook solutionChapter 12 Solutions
Introductory Statistics (2nd Edition)
Additional Math Textbook Solutions
Fundamentals of Statistics (5th Edition)
Elementary Statistics ( 3rd International Edition ) Isbn:9781260092561
EBK STATISTICAL TECHNIQUES IN BUSINESS
Elementary Statistics (Text Only)
Applied Statistics in Business and Economics
Business Statistics: A First Course (7th Edition)
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw HillBig Ideas Math A Bridge To Success Algebra 1: Stu...AlgebraISBN:9781680331141Author:HOUGHTON MIFFLIN HARCOURTPublisher:Houghton Mifflin Harcourt
- Holt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGALAlgebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:Cengage