Chapter 1
What is Statistics?
1. a. Interval
b. Ratio
c. Interval
d. Nominal
e. Ordinal
f. Ratio
2. a. Ratio
b. Nominal
c. Ratio
d. Ratio
3. Answers will vary
4. a. Sample
b. Population
c. Population
d. Sample
5. Qualitative data is not numerical, whereas quantitative data is numerical. Examples will vary by student.
6. A population is the entire group which you are studying. A sample is a subset taken from a population.
7. Discrete variables can assume only certain values, but continuous variables can assume any values within some range. Examples will vary
8. a. A sample is used because it is difficult to locate every student.
b. A population is employed because the information is easy to find.
c. A population is used because the information is easy to find.
d. A sample works because it is difficult to locate every musical.
9. Discrete Continuous
Qualitative b. Gender
d. Soft drink preference
Quantitative f. SAT scores a. Salary
g. Student rank in class c. Sales volume of MP3 players
h. Rating of a finance professor e. Temperature
i. Number of home computers
Discrete Continuous
Nominal b. Gender
Ordinal d. Soft drink preference
g. Student rank in class
h. Rating of a finance professor
Interval f. SAT scores e. Temperature
Ratio a. Salary
c. Sales volume of MP3 players
i. Number of home computers
10. Answers will vary
11. As a result of these sample findings, we can conclude that 120/300 or 40 percent of the white-collar workers would transfer outside the U.S.
12. The obvious majority of consumers tested (400/500, or 80%) believe the policy is fair. On the strength of these findings, we can anticipate a similar proportion of all customers to feel the same.
13. a. Yes, every company has increased sales.
b. GM market share increased 9% while Ford lost 6% and Chrysler lost 3%.
14. There was a large decrease in 2002, but earning generally...