1. Determine whether the underlined value is a parameter or a statistic. The ave
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Question
1. Determine whether the underlined value is a parameter or a statistic.
The average age of men who had walked on the moon was 39 years, 11 months, 15 days.
Is the value a parameter or a statistic?
MULTIPLE CHOICE
A. The value is a parameter because the men who had walked on the moon are a population.
B. The value is a parameter because the men who had walked on the moon are a sample.
C. The value is a statistic because the men who had walked on the moon are a sample.
D. The value is a statistic because the men who had walked on the moon are a population.
2. Determine whether the variable is qualitative or quantitative.
Amount of money spent on computers this year
is the variable qualitative or quantitative?
MULTIPLE CHOICE
A. The variable is quantitative because it is an attribute characteristic.
quantitative
B. The variable is qualitative because it is an attribute characteristic.
C. The variable is quantitative because it is a numerical measure.
D. The variable is qualitative because it is a numerical measure.
3. Determine the level of measurement of the variable.
Height of a child:27 in, 28 in, 29 in, 30 in, and 31 in
MULTIPLE CHOICE
A. Interval
B. Ordinal
C. Ratio
D. Nominal
4. A quality-control manager randomly selects 40 bottles of soda that were filled on March 21 to assess the calibration of the filling machine.
MULTIPLE CHOICE
What is the population in the study?
A. The 40 bottles of soda selected in the plant on March 21.
B. Bottles of soda produced in the plant.
C. The 40 bottles of soda selected in the plant.
D. Bottles of soda produced in the plant on March 21.
What is the sample in the study?
A. The 40 bottles of soda selected in the plant in March.
B. Bottles of soda produced in the plant.
C. Bottles of soda produced in the plant on March 21.
D. The 40 bottles of soda selected in the plant on March 21.
5. What does it mean when an observational study is retrospective? What does it mean when an observational study is prospective?
What does it mean when an observational study is retrospective?
MULTIPLE CHOICE
A. A retrospective study requires that individuals look back in time or require the researcher to look at existing records.
B. A retrospective study collects the data over time.
C. An retrospective study is a list of all individuals in a population along with certain characteristics of each individual.
What does it mean when an observational study is prospective?
A. A prospective study collects the data over time.
B. An prospective study is a list of all individuals in a population along with certain characteristics of each individual.
C. A prospective study requires that individuals look back in time or require the researcher to look at existing records.
7. Determine whether the study depicts an observational study or an experiment.
Sixth grade students are randomly divided into two groups. One group is taught English using
traditional techniques. The other is taught English using a reform method. After 1 year each group is given an achievement test to compare its proficiency with that of the other group.
Choose the correct description of the study.
MULTIPLE CHOICE
A. The study is an experiment because the researchers control one variable to determine the effect on the response variable.
B. The study is an observational study because the study examines individuals in a sample, but does not try to influence the response variable.
C. The study is an observational study because the researchers control one variable to determine the effect on the response variable.
D. The study is an experiment because the study examines individuals in a sample, but does not try to influence the variable of interest.
11. To help assess student learning in her art history courses, an art professor at a community college implemented pre- and post-tests for her art history students. A knowledge-gained score was obtained by taking the difference of the two test scores.
MULTIPLE CHOICE
What type of experimental design is this?
A. Randomized block design
B. Matched pair
C. Completely randomized design
D. Case-control
What is the response variable in this experiment?
A. The score on the pretest
B. Difference in test scores
C. The score on the posttest
D. Total in test scores
What is the treatment?
A. Background of student
B. Type of school
C. Art history course
D. Art history scores
Explanation / Answer
1. Here it is given that The average age of men who had walked on the moon was 39 years, 11 months, 15 days.
Which means this value is of population.
Parameters are numbers that summarize data for an entire population. Statistics are numbers that summarize data from a sample, i.e. some subset of the entire population.
As average value summarize data of entire population.
This is Parameter
Hence answer is
A. The value is a parameter because the men who had walked on the moon are a population.
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