Identify which of these types of sampling is used: simple random, stratified, systematic, or convenience.A market researcher selects 500 people from each of 10 cities.
A. Convenience
B. Simple random
C. Stratified
D. Systematic
Answer: C
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In the sense used in the textbook, which of the following would be not classified as an innovation?
A. the development of a unique wind-resistant glass for commercial and residential buildings B. implementing a method of marketing medical services to a new population C. the creation of a new database management system for an organization D. increasing the efficiency of a manufacturing plant by running two shifts of workers
Write an equation of the line.
A. y = 
x
B. y = - 
x
C. y = 
x
D. y = - 
x
Solve the problem using the elimination method.There were 30,000 people at a ball game in Los Angeles. The day's receipts were $252,000. How many people paid $14 for reserved seats and how many paid $6 for general admission?
A. 18,000 paid $14 and 12,000 paid $6 B. 12,000 paid $14 and 18,000 paid $6 C. 21,000 paid $14 and 9000 paid $6 D. 9000 paid $14 and 21,000 paid $6
Simplify.390 - 23? 24 ÷ (4?3 - 2?2)
A. 1,146 B. 760 C. 366 D. 370