Assignment 3
Study online at
https://quizlet.com/_cuaub9
1. Determine whether the evaluated group is a population or a
sample:
A researcher determines that 42.7% of all downtown office
buildings have ventilation problems.: Population
2. 2) 2. (1pts)
Determine whether the evaluated group is a population or a
sample: After taking the first exam, 15 students dropped the
class.: Sample
3. Determine whether the given value is a statistic or a parameter.
A researcher determines that 42.7% of all downtown office
buildings have ventilation problems.: Parameter
4. Determine whether the given value is a statistic or a
parameter. After taking the first exam, 15 students
dropped the class.: Statistic
5. One month before a recall election, a poll of 500 Wisconsin voters
showed that 46% planned to vote for the Democratic challenger
Tom Barrett and 45% planned to vote for Republican Governor Scott
Walker. Undecided voters constituted another 9%. The margin of
error was 5 percentage points. What conclusion can you draw from this
poll?: The race is too close to call.
41% ~ 51% for the Democratic challenger Tom
Barrett vs
40%~50% for Republican Governor Scott
Walker. So, it is too close to call.
6. In a survey of 80 high school football players who committed to
play in the Division III CCIW conference, 64 said that they would
work out in their high school weight rooms in the summer before
college. The margin of error for the survey was 6%. A census of all
CCIW football players (not just freshmen) showed that 59% worked
out at their high schools. One can conclude that: the sample was not
representative of the population.
Feedback: 64 of 80 corresponds to 80%. The margin of error for the survey is 6%. So, according to the
1/
8
, Assignment 3
Study online at
survey results, the parameter
(i.e., true value) would be included in 72%~86%. But, the parameter is
https://quizlet.com/_cuaub9
less than the range. So, we can conclude that the sample from the survey was not representative of
the population.
7. Data has been collected from a representative sample of a
well-defined population to answer the question: "How much
money does the average senior male at Normal Community High
School have in his pockets at the end
2/
8
Study online at
https://quizlet.com/_cuaub9
1. Determine whether the evaluated group is a population or a
sample:
A researcher determines that 42.7% of all downtown office
buildings have ventilation problems.: Population
2. 2) 2. (1pts)
Determine whether the evaluated group is a population or a
sample: After taking the first exam, 15 students dropped the
class.: Sample
3. Determine whether the given value is a statistic or a parameter.
A researcher determines that 42.7% of all downtown office
buildings have ventilation problems.: Parameter
4. Determine whether the given value is a statistic or a
parameter. After taking the first exam, 15 students
dropped the class.: Statistic
5. One month before a recall election, a poll of 500 Wisconsin voters
showed that 46% planned to vote for the Democratic challenger
Tom Barrett and 45% planned to vote for Republican Governor Scott
Walker. Undecided voters constituted another 9%. The margin of
error was 5 percentage points. What conclusion can you draw from this
poll?: The race is too close to call.
41% ~ 51% for the Democratic challenger Tom
Barrett vs
40%~50% for Republican Governor Scott
Walker. So, it is too close to call.
6. In a survey of 80 high school football players who committed to
play in the Division III CCIW conference, 64 said that they would
work out in their high school weight rooms in the summer before
college. The margin of error for the survey was 6%. A census of all
CCIW football players (not just freshmen) showed that 59% worked
out at their high schools. One can conclude that: the sample was not
representative of the population.
Feedback: 64 of 80 corresponds to 80%. The margin of error for the survey is 6%. So, according to the
1/
8
, Assignment 3
Study online at
survey results, the parameter
(i.e., true value) would be included in 72%~86%. But, the parameter is
https://quizlet.com/_cuaub9
less than the range. So, we can conclude that the sample from the survey was not representative of
the population.
7. Data has been collected from a representative sample of a
well-defined population to answer the question: "How much
money does the average senior male at Normal Community High
School have in his pockets at the end
2/
8
