Quantitative Research Techniques + Statistics -
Peregrine EXAM comprehensive questions and
verified accurate solution (detailed & elaborated)
2025 TEST!!
A company developed a smartphone whose average lifetime is unknown. In
order to estimate the average, 200 smartphones are randomly selected from a
large production line and tested; their average is found to be 5 years. The 200
smartphones represent: - (ANSWER)a sample
Significance level - (ANSWER)Measures the reliability of a statistical inference
inferential statistics - (ANSWER)Process of using sample statistics (mathematics)
to draw conclusions about population parameters
mutually exclusive - (ANSWER)Events that cannot occur at the same time.
sampling error - (ANSWER)the difference between the results of random samples
taken at the same time
non-sampling error - (ANSWER)occurs when the sample data are incorrectly
collected, recorded, or analyzed. Three types of errors: data acquisition errors,
non-response errors (or bias), selection bias
, Design of a good survey components - (ANSWER)short survey, short/simple
questions, start with demographic questions, ues dichtomous (yes-no) and
multiple choice
Direct observation - (ANSWER)example: counts backpacks on campus for a day
stratified random sample - (ANSWER)a sample from selected subgroups of the
target population in which everyone in those subgroups has an equal chance of
being included in the research
example: The manager of a customer service division wants to know if the
customers in the past 12 months are satisfied with their purchase of CD's. There
are four types of CD's.
Joint Probability - (ANSWER)the probability of the intersection of two events
Union of two events - (ANSWER)The union of events A and B is the event
containing all sample points that are in A or B or both
Marginal Probability - (ANSWER)the probability of a single event without
consideration of any other event
Conditional Probability - (ANSWER)the likelihood that a target behavior will occur
in a given circumstance
Peregrine EXAM comprehensive questions and
verified accurate solution (detailed & elaborated)
2025 TEST!!
A company developed a smartphone whose average lifetime is unknown. In
order to estimate the average, 200 smartphones are randomly selected from a
large production line and tested; their average is found to be 5 years. The 200
smartphones represent: - (ANSWER)a sample
Significance level - (ANSWER)Measures the reliability of a statistical inference
inferential statistics - (ANSWER)Process of using sample statistics (mathematics)
to draw conclusions about population parameters
mutually exclusive - (ANSWER)Events that cannot occur at the same time.
sampling error - (ANSWER)the difference between the results of random samples
taken at the same time
non-sampling error - (ANSWER)occurs when the sample data are incorrectly
collected, recorded, or analyzed. Three types of errors: data acquisition errors,
non-response errors (or bias), selection bias
, Design of a good survey components - (ANSWER)short survey, short/simple
questions, start with demographic questions, ues dichtomous (yes-no) and
multiple choice
Direct observation - (ANSWER)example: counts backpacks on campus for a day
stratified random sample - (ANSWER)a sample from selected subgroups of the
target population in which everyone in those subgroups has an equal chance of
being included in the research
example: The manager of a customer service division wants to know if the
customers in the past 12 months are satisfied with their purchase of CD's. There
are four types of CD's.
Joint Probability - (ANSWER)the probability of the intersection of two events
Union of two events - (ANSWER)The union of events A and B is the event
containing all sample points that are in A or B or both
Marginal Probability - (ANSWER)the probability of a single event without
consideration of any other event
Conditional Probability - (ANSWER)the likelihood that a target behavior will occur
in a given circumstance
