STATS: DATA AND MODELS
4TH CANADIAN EDITION
CHAPTER NO. 1: STATS STARTS HERE
1.1 What is Statistics?
1) True or False: Data are always numbers.
Answer: FALSE
Diff: 1 Type: TF
Objective: (1.1) What is Statistics?
2) True or False: Individuals can be statistics.
Answer: FALSE
Diff: 1 Type: TF
Objective: (1.1) What is Statistics?
3) Is the statement below a correct use of the word "statistics"? If not, why?
"Don't drink and drive; you don't want to be a statistic."
Answer: No. Individuals cannot be statistics.
Diff: 1 Type: SA
Objective: (1.1) What is Statistics?
1.2 Data
1) Identify the W's for the description of data.
A survey of bicycles parked outside student residences at a university recorded the style
(mountain bike, ten speed, etc.), the brand, the color, and the age.
A) Who: Student residences.; Cases: Each student residence is a case; What: Type of student
residence; When: Not specified; Where: A university; Why: Not specified; How: A survey was
taken outside student residences.
,B) Who: Bicycles parked on campus; Cases: Each bicycle is a case; What: Style, brand, color,
and age of bicycle; When: Not specified; Where: A university; Why: Class Assignment; How: A
survey was taken outside classrooms.
C) Who: Bicycles parked outside student residences.; Cases: Each bicycle is a case; What: Style,
brand, color, and age of bicycle; When: Not specified; Where: A university; Why: Not specified;
How: A survey was taken outside student residences.
D) Who: Bicycles parked outside student residences; Cases: Each bicycle is a case; What:
Mountain bikes, ten speeds; When: Not specified; Where: A university; Why: Not specified;
How: Students were asked about the bicycle they ride.
E) Who: Student residences.; Cases: Each student residences is a case; What: Size of student
residence; When: During fall semester; Where: A university; Why: Not specified; How: A
survey was taken outside student residences.
Answer: C
Diff: 1 Type: BI
Objective: (1.2) Determine the W's for a Description of Data
2) Identify the W's for the description of data.
A university requires coaches to keep these records on all athletes: age, days absent, medical
history, emergency contact, and any allergies the athlete may have.
A) Who: Athletes at the university; Cases: Each athlete is an individual case; What: Age, days
absent, medical history, emergency contact, and allergy history; When: Current; Where: Not
specified; Why: University requirement; How: Information is collected and stored as athletic
records.
B) Who: The University; Cases: Each athlete is an individual case; What: Records; When:
Current; Where: Not specified; Why: University requirement; How: Information is collected and
stored as athletic records.
C) Who: Coaches at the university; Cases: Each team is an individual case; What: Age, days
absent, medical history, emergency contact, and allergy history; When: Current; Where: Not
specified; Why: University requirement; How: Information is collected and stored as athletic
records.
D) Who: Athletes at the university; Cases: Each athlete is an individual case; What: Years
played, sport played, and position played; When: Current; Where: Not specified; Why:
,University requirement; How: Information is collected and stored as athletic records.
E) Who: Athletes at the university; Cases: Each athlete is an individual case; What: Records;
When: Current; Where: Not specified; Why: Helpful information; How: Ask the athlete.
Answer: A
Diff: 1 Type: BI
Objective: (1.2) Determine the W's for a Description of Data
3) Identify the W's for the description of data.
In 2017, a soft drink company trying to find ways to boost sales over their competitors compiled
these data about consumers: age, weekly consumption, diet vs. regular preference, cola vs non-
cola preference, and geographical location.
A) Who: Soft drink companies; Cases: Each company is a case; What: Age, weekly
consumption, diet vs. regular preference, cola vs. non-cola preference, and geographical location;
When: June, 2017; Where: United States; Why: To find ways to boost sales.
B) Who: Consumers; Cases: Each consumer is a case; What: Age, weekly consumption, diet vs.
regular preference, cola vs. non-cola preference, and geographical location; When: 2017; Where:
Not specified; Why: To find ways to boost sales.
C) Who: Consumers; Cases: Each consumer is a case; What: Age; When: 2017; Where: Not
specified; Why: To find ways to boost sales.
D) Who: Consumers; Cases: Each consumer is a case; What: Age, weekly consumption, and
geographical location; When: 2017; Where: Not specified; Why: To develop new products.
E) Who: Soft drink companies; Cases: Each company is a case; What: Age, weekly
consumption, diet vs. regular preference, cola vs. non-cola preference, and geographical location;
When: 2017; Where: Not specified; Why: To find ways to boost sales.
Answer: B
Diff: 1 Type: BI
Objective: (1.2) Determine the W's for a Description of Data
, 4) Identify the W's for the description of data.
A consumer reporting magazine published an article evaluating infant car seats in Canada. It
listed 10 models, giving the brand, cost, age limit, weight limit, and overall safety rating.
A) Who: 10 infant car seat models; Cases: Each article is an individual case; What: Overall
safety rating; When: Not specified; Where: Canada; Why: To provide information to readers;
How: Survey new parents.
B) Who: Magazines; Cases: Each magazine is an individual case; What: Articles; When: Not
specified; Where: Canada; Why: To provide information to readers; How: Not specified.
C) Who: Consumer reporting magazine; Cases: Each article; What: Infant car seat models;
When: Not specified; Where: Canada; Why: To provide information to readers; How: Not
specified.
D) Who: 10 infant car seat models; Cases: Each model is an individual case; What: Brand, cost,
age limit, weight limit, and overall safety rating; When: Not specified; Where: Canada; Why: To
provide information to readers; How: Not specified.
E) Who: Consumers; Cases: Each consumer is an individual case; What: Consumer reporting
magazine; When: Not specified; Where: Canada; Why: To provide information to readers; How:
Not specified.
Answer: D
Diff: 1 Type: BI
Objective: (1.2) Determine the W's for a Description of Data
5) Identify the W's for the description of data.
Nutritionists at a large university investigating the impact of dining hall food choices on
freshman weight gain collected data (through weekly surveys) from 300 students throughout
their freshman year. They kept track of the student's age, the number of times eating in the hall
per week, the number of hours spent exercising per week, and the student's weight each week.
A) Who: Nutritionists; Cases: Each student is a case; What: Student's age, number of times
eating in hall weekly, number of hours exercising weekly, and the student's weekly weight;
When: Freshman year; Where: A large university; Why: To study the impact of dining hall
choices on freshman weight gain; How: Weekly surveys.