STAT 211 EXAM 4 QUESTIONS AND 100%
CORRECT ANSWERS!!
Determine whether the given value is a statistic or a parameter.
Thirty percent of all dog owners poop scoop after their dog.
Parameter
A____ is the complete collection of all measurements or data collected, whereas, a __ is a
subcollection of members selected from the complete collection.
Population; sample
Determine whether the given value is a discrete or continuous variable.
People asked to state how many times in the last month they visited their family doctor.
Discrete
Determine whether the given value is from a discrete or continuous data set.
The time it takes to complete a task.
Continuous
Determine which of the four levels of measurement is most appropriate.
Students' grades (A, B, or C) on
a test.
Ordinal
The four levels of measurement that are commonly used for classifying data are ratio,
________, ________, and ________.
Nominal; ordinal; interval
, Determine which level of measurement is appropriate.
Salaries of college professors
Ratio
Identify the type of sampling that is used in this statement.
A pollster uses a computer to generate 500 random numbers, then interviews the voters
corresponding to those numbers. Identify which type of sampling is used.
Random
An education expert is researching teaching methods and wishes to interview teachers from
a particular school district. She randomly selects ten schools from the district and
interviews all of the teachers at the selected schools. Does this sampling plan result in a
random sample? Simple random sample? Explain.
The sample is random because all teachers have the same chance of being selected. It is not a
simple random sample because some samples are not possible, such as a sample that includes
teachers from schools that were not selected.
A psychology student wishes to investigate differences in political opinions between
business majors and political science majors at her college. She randomly selects 100
students from the 260 business majors and 100 students from the 180 political science
majors. Does this sampling plan result in a random sample? Simple random sample?
Explain.
The sample is not random because political science majors have a greater chance of being
selected than business majors. It is not a simple random sample because some samples are not
possible, such as a sample consisting of 50 business majors and 150 political science majors.
Which of the following is an inappropriate way to deal with missing data?
ignore missing data
CORRECT ANSWERS!!
Determine whether the given value is a statistic or a parameter.
Thirty percent of all dog owners poop scoop after their dog.
Parameter
A____ is the complete collection of all measurements or data collected, whereas, a __ is a
subcollection of members selected from the complete collection.
Population; sample
Determine whether the given value is a discrete or continuous variable.
People asked to state how many times in the last month they visited their family doctor.
Discrete
Determine whether the given value is from a discrete or continuous data set.
The time it takes to complete a task.
Continuous
Determine which of the four levels of measurement is most appropriate.
Students' grades (A, B, or C) on
a test.
Ordinal
The four levels of measurement that are commonly used for classifying data are ratio,
________, ________, and ________.
Nominal; ordinal; interval
, Determine which level of measurement is appropriate.
Salaries of college professors
Ratio
Identify the type of sampling that is used in this statement.
A pollster uses a computer to generate 500 random numbers, then interviews the voters
corresponding to those numbers. Identify which type of sampling is used.
Random
An education expert is researching teaching methods and wishes to interview teachers from
a particular school district. She randomly selects ten schools from the district and
interviews all of the teachers at the selected schools. Does this sampling plan result in a
random sample? Simple random sample? Explain.
The sample is random because all teachers have the same chance of being selected. It is not a
simple random sample because some samples are not possible, such as a sample that includes
teachers from schools that were not selected.
A psychology student wishes to investigate differences in political opinions between
business majors and political science majors at her college. She randomly selects 100
students from the 260 business majors and 100 students from the 180 political science
majors. Does this sampling plan result in a random sample? Simple random sample?
Explain.
The sample is not random because political science majors have a greater chance of being
selected than business majors. It is not a simple random sample because some samples are not
possible, such as a sample consisting of 50 business majors and 150 political science majors.
Which of the following is an inappropriate way to deal with missing data?
ignore missing data
