QUANTITATIVE RESEARCH TECHNIQUES
STATISTICS PEREGRINE 70 VERIFIED QUESTIONS
AND ANSWERS UPDATED 2026 || GRADED A+
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: - CORRECT ANSWER - a sample
Significance level - CORRECT ANSWER - Measures the reliability of a
statistical inference
inferential statistics - CORRECT ANSWER - Process of using sample
statistics (mathematics) to draw conclusions about population parameters
mutually exclusive - CORRECT ANSWER - Events that cannot occur at the
same time.
sampling error - CORRECT ANSWER - the difference between the results of
random samples taken at the same time
non-sampling error - CORRECT 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 - CORRECT ANSWER - short survey,
short/simple questions, start with demographic questions, ues dichtomous (yes-no)
and multiple choice
Direct observation - CORRECT ANSWER - example: counts backpacks on
campus for a day
stratified random sample - CORRECT 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 - CORRECT ANSWER - the probability of the intersection
of two events
Union of two events - CORRECT 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 - CORRECT ANSWER - the probability of a single
event without consideration of any other event
Conditional Probability - CORRECT ANSWER - the likelihood that a target
behavior will occur in a given circumstance
STATISTICS PEREGRINE 70 VERIFIED QUESTIONS
AND ANSWERS UPDATED 2026 || GRADED A+
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: - CORRECT ANSWER - a sample
Significance level - CORRECT ANSWER - Measures the reliability of a
statistical inference
inferential statistics - CORRECT ANSWER - Process of using sample
statistics (mathematics) to draw conclusions about population parameters
mutually exclusive - CORRECT ANSWER - Events that cannot occur at the
same time.
sampling error - CORRECT ANSWER - the difference between the results of
random samples taken at the same time
non-sampling error - CORRECT 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 - CORRECT ANSWER - short survey,
short/simple questions, start with demographic questions, ues dichtomous (yes-no)
and multiple choice
Direct observation - CORRECT ANSWER - example: counts backpacks on
campus for a day
stratified random sample - CORRECT 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 - CORRECT ANSWER - the probability of the intersection
of two events
Union of two events - CORRECT 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 - CORRECT ANSWER - the probability of a single
event without consideration of any other event
Conditional Probability - CORRECT ANSWER - the likelihood that a target
behavior will occur in a given circumstance
