b, c, d.
Answers will vary
82% like to snack at home
employed American adults
U.S. Labor Department
number of cashiers surveyed in 1996; median
hourly pay rate
American travelers on trips of 100 miles or more
38-year-old male, income $50,000 or more, trav-
els by car between 100 and 300 miles, usually to
visit friends or relatives and stays at their homes
Actual percentage could range from 50% to 58%
has driver ever had to suddenly swerve, inadver-
tently speeded up, know someone who had crash
while talking on cellphone
41% of those surveyed said they had inadver-
tently speeded up
Percentages are from different groups
took samples from various spots in the bay
new pollution laws enacted
population: all U.S. adults; sample: 1200 adults; vari-
able: “allergy status”; one data: yes, dust; data: set of
yes/no responses or allergies; experiment: method to
select the adults; parameter: percent of all U.S.
adults with an allergy, 36%; statistic: 33.2% based on
Parameter has one speciFc value. Statistics vary by
Sample averages vary less for samples of size 10—
the larger sample size
ZIP code, gender, highest level of education
annual income, age, distance to store
marital status, ZIP code
highest level of education, rating for Frst impression
Scores are counted.
Time is measured.
residents of Lee County, ±lorida
households of Lee County, residents, registered
income, age, political afFliation
income, continuous; age, continuous; political af-
Collected data were counted by categories.
severity of side-effects
all individuals who have hypertension and use
prescription drugs to control it
5,000 in study
proportion of population for which drug is effec-
proportion of the sample for which the drug is
all assembled parts from the assembly line
attribute, attribute, numerical
all people suffering from migraine headaches
2,633 people given the drug
amount of drug dosage, the side effects encoun-
dosage, quantitative; type of side effects, qualita-
The population contains all objects of interest;
sample contains only those actually studied.
convenience, availability, practicality
football players, cover a wider range of values
Price/standard unit makes price the only variable.
Sample size of 4 shows more variability.
Sample size of 10, less variability
Answers include reference to an economic bias.