STAT 211 EXAM QUESTIONS AND 100%
CORRECT ANSWERS!!
A Statistic is an "estimate of the truth" whereas a Parameter represents the "truth."
True
Miles per hour (i.e., 75.00 mph) is an example of a continuous data point.
True
Fully 2/3 of all dentists surveyed recommend "Crest" Toothpaste.
False
Determine whether the given value is a statistic or a parameter.
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 are 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 a computer to complete a task
Continous
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
A pollster uses a computer to generate 500 random numbers, then interviews the voters
corresponding to those numbers. Identify the 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
The name of each contestant is written on a separate card, the cards are placed in a bag,
and three names are picked from the bag.
Simple Random
CORRECT ANSWERS!!
A Statistic is an "estimate of the truth" whereas a Parameter represents the "truth."
True
Miles per hour (i.e., 75.00 mph) is an example of a continuous data point.
True
Fully 2/3 of all dentists surveyed recommend "Crest" Toothpaste.
False
Determine whether the given value is a statistic or a parameter.
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 are 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 a computer to complete a task
Continous
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
A pollster uses a computer to generate 500 random numbers, then interviews the voters
corresponding to those numbers. Identify the 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
The name of each contestant is written on a separate card, the cards are placed in a bag,
and three names are picked from the bag.
Simple Random
