MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Determine whether the data set is a population or a sample.
1) The age of every fourth person entering a department store
A) sample B) population
Answer: A
2) The age of each employee at a local grocery store
A) sample B) population
Answer: B
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Identify the population and the sample.
3) A survey of 1212 American households found that 52% of the households own a computer.
Answer: population: collection of all American households; sample: collection of 1212 American households
surveyed
4) When 1348 American households were surveyed, it was found that 57% of them owned two cars.
Answer: population: collection of all American households; sample: collection of 1348 American households
surveyed
5) A survey of 2625 elementary school children found that 28% of the children could be classified as obese.
Answer: population: elementary school children; sample: collection of 2625 elementary school children surveyed.
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Use the Venn diagram to identify the population and the sample.
6)
A) Population: Magazine subscribers; Sample; Magazine subscribers who renew their subscription
B) Population: Magazine subscribers who renew their subscription; Sample: Magazine subscribers
Answer: A
1
,SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Determine whether the numerical value is a parameter or a statistic. Explain your reasoning.
7) A recent survey by the alumni of a major university indicated that the average salary of 10,500 of its 200,000
graduates was $130,000.
Answer: It describes a statistic because the number $130,000 is based on a subset of the population.
8) The average salary of all assembly-line employees at a certain car manufacturer is $44,000.
Answer: It describes a parameter because the $44,000 is based on all the workers at the car manufacturer.
9) A survey of 1040 students was taken from a university with 19,000 students.
Answer: It describes a statistic because the number 1040 is based on a subset of the population.
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Identify whether the statement describes inferential statistics or descriptive statistics.
10) The average age of the students in a statistics class is 20 years.
A) descriptive statistics B) inferential statistics
Answer: A
11) The chances of winning the California Lottery are one chance in twenty-two million.
A) descriptive statistics B) inferential statistics
Answer: B
12) There is a relationship between smoking cigarettes and getting emphysema.
A) inferential statistics B) descriptive statistics
Answer: A
13) From past figures, it is predicted that 31% of the registered voters in California will vote in the June primary.
A) descriptive statistics B) inferential statistics
Answer: B
14) Based on previous clients, a marriage counselor concludes that the majority of marriages that begin with
cohabitation before marriage will result in divorce.
A) descriptive statistics B) inferential statistics
Answer: B
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Provide an appropriate response.
15) Explain the difference between a sample and a population.
Answer: A population is the collection of all outcomes, responses, measurements, or counts that are of interest.. A
sample is a subset of a population.
16) If you had to do a statistical study, would you use a sample or a population? Why?
Answer: A sample would be used. It is usually impractical to obtain all the population data.
2
, MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Determine whether the data are qualitative or quantitative.
17) the colors of automobiles on a used car lot
A) qualitative B) quantitative
Answer: A
18) the number of complaint letters received by the United States Postal Service in a given day
A) qualitative B) quantitative
Answer: B
19) the number of seats in a movie theater
A) qualitative B) quantitative
Answer: B
20) the numbers on the shirts of a girl's soccer team
A) qualitative B) quantitative
Answer: A
Identify the data set's level of measurement.
21) hair color of women on a high school tennis team
A) ordinal B) interval C) ratio D) nominal
Answer: D
22) numbers on the shirts of a girl's soccer team
A) ordinal B) nominal C) interval D) ratio
Answer: B
23) ages of students in a statistic class
A) nominal B) ordinal C) ratio D) interval
Answer: C
24) temperatures of 26 selected refrigerators
A) ordinal B) ratio C) interval D) nominal
Answer: C
25) number of milligrams of tar in 30 cigarettes
A) ordinal B) ratio C) nominal D) interval
Answer: B
26) number of pages in your statistics book
A) interval B) nominal C) ordinal D) ratio
Answer: D
27) marriage status (married, single, or divorced) of the faculty at the University of Colorado
A) ordinal B) ratio C) nominal D) interval
Answer: C
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