Concept explainers
Teenage Marketing In 2000, 22% of all teenagers in the United States had checking accounts.52 Your bank, Teen-Chex, Inc., is interested in targeting teenagers who do not already have a checking account.
a. If TeenChex selects a random sample of 1,000 teenagers, what number of teenagers without checking accounts can it expect to find? What is the standard deviation of this number? (Round the standard deviation to one decimal place.)
b. Fill in the missing quantities: There is an approximately 95% chance that between ___ and ___ teenagers in the sample will not have checking accounts. (Round answers to the nearest whole number.)
Trending nowThis is a popular solution!
Chapter 8 Solutions
Bundle: Finite Mathematics, Loose-leaf Version, 7th + WebAssign Printed Access Card for Waner/Costenoble's Finite Mathematics, 7th Edition, Single-Term
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw HillHolt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGAL
- Big Ideas Math A Bridge To Success Algebra 1: Stu...AlgebraISBN:9781680331141Author:HOUGHTON MIFFLIN HARCOURTPublisher:Houghton Mifflin Harcourt