Unit: Using Statistics in Business
Complete the following problems in the text:
- Problem 1.2
- Problem 1.26
- Problem 1.30
- Problem 1.48
- Problem 1.50
1.2 Do you work hard for your money? Java professionals think they do, reporting long working hours at their jobs. Java developers from around the world were surveyed about the number of hours they work weekly. Listed here are the average number of hours worked weekly in various regions of the United States and the world. Region Hours Worked U.S 48 Northeast 47 Mid-Atlantic 49 South 47 Midwest 47 Central Mt 51 California 50 Pacific NW 47 Canada 43 Europe 48 Asia 47 South America and Africa 49 SOURCE: Jupitermedia Corporation a.How many hours do you work per week (or anticipate working after you graduate)? b.What happened to the 40-hour workweek? Does it appear to exist for the Java professional? c.Does the information in this chart make a career of being a Java professional seem attractive? 1.26 Suppose a 12-year-old asked you to explain the difference between a sample and a population. a.What information should your answer include? b.What reasons would you give him or her for why one would take a sample instead of surveying every member of the population? 1.30 A coin-operated coffee vending machine dispenses, on the average, 6 oz of coffee per cup. Can this statement be true of a vending machine that occasionally dispenses only enough to fill the cup half full (say, 4 oz)? Explain. 1.48 The election board’s voter registration list is not a census of the adult population. Explain why. 1.50 How have computers increased the usefulness of statistics to professionals such as researchers, government workers who analyze data, statistical consultants, and others?