Exam
Name___________________________________
MULTIPLE CHOICE.
Choose the one alternative that best completes the statement or answers the question.
Determine whether the evaluated group is a population or a sample.
1) The average age of 45 employees of a large company is found to be 32 years.
1)
A) Sample
B) Population
2) A researcher examines the records of all the registered voters in one city and finds that 43% are
registered Democrats.
2)
A) Population
B) Sample
Determine whether the given value is a sample statistic or a population parameter.
3) A researcher determines that of all 25 year old women in her city, 37% are married.
3)
A) Sample statistic
B) Population parameter
4) An investigation of 150 randomly selected local restaurants concluded that 42% of local restaurants
have serious health code violations.
4)
A) Population parameter
B) Sample statistic
Answer the question.
5) Based on a poll, a newspaper reported that between 56% and 64% of voters would be likely to vote
for a school bond issue. What is the margin of error of the poll?
5)
A) 4%
B) 10%
C) 32%
D) 28%
Provide an appropriate response.
6) A poll of 700 persons attending the Taste of Chicago showed that 455 persons, 65% of the sample,
believed that the food was overpriced. It is estimated that 1,250,000 persons attend the Taste.
Statistics suggest that, although 65% of attendees, with a margin of error of 5 percentage points,
believe that the food is overpriced, the Taste is a popular event. The raw data of the study is
6)
A) 1,250,000 persons, 700 persons, 455 persons.
B) the margin of error, 5 percentage points.
C) 65% of the sample.
D) the individual responses to the question.
7) A poll of 700 persons attending the Taste of Chicago showed that 455 persons,
65% of the sample,
believed that the food was overpriced. It is estimated that 1,250,000 persons attend the Taste.
Statistics suggest that, although 65% of attendees, with a margin of error of 5 percentage points,
believe that the food is overpriced, the Taste is a popular event. The goal of the study was to
7)
A) determine whether the Taste is popular despite the price.
B) determine the number of attendees who believe the food is overpriced.
C) determine whether the food is overpriced.
D) determine the percentage of attendees who believed the food is overpriced.
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