1
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Quantitative Research Techniques +
Statistics - Peregrine Questions and
Answers (100% Correct Answers) Already
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
© 2025 Assignment Expert
average is found to be 5 years. The 200 smartphones represent:
[ANS:] a sample
Significance level [ANS:] Measures the reliability of a statistical
Guru01 - Stuvia
inference
inferential statistics [ANS:] Process of using sample statistics
(mathematics) to draw conclusions about population parameters
mutually exclusive [ANS:] Events that cannot occur at the same
time.
sampling error [ANS:] the difference between the results of
random samples taken at the same time
non-sampling error [ANS:] 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 [ANS:] short survey,
short/simple questions, start with demographic questions, ues
dichtomous (yes-no) and multiple choice
, 2
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Direct observation [ANS:] example: counts backpacks on campus
for a day
stratified random sample [ANS:] 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
© 2025 Assignment Expert
purchase of CD's. There are four types of CD's.
Joint Probability [ANS:] the probability of the intersection of two
events
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Union of two events [ANS:] The union of events A and B is the
event containing all sample points that are in A or B or both
Marginal Probability [ANS:] the probability of a single event
without consideration of any other event
Conditional Probability [ANS:] the likelihood that a target behavior
will occur in a given circumstance
Bayes Law [ANS:] calculates posterior probability
exhaustive [ANS:] including everything possible; very thorough or
complete
Central Limit Theorem (CLT) [ANS:] The name of the theorem
stating that the sampling distribution of a statistic (e.g. x ) is
approximately normal whenever the sample is large and random.
Allows us to draw conclusions about the population based on
strictly sample data.
For Expert help and assignment solutions, +254707240657
Quantitative Research Techniques +
Statistics - Peregrine Questions and
Answers (100% Correct Answers) Already
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
© 2025 Assignment Expert
average is found to be 5 years. The 200 smartphones represent:
[ANS:] a sample
Significance level [ANS:] Measures the reliability of a statistical
Guru01 - Stuvia
inference
inferential statistics [ANS:] Process of using sample statistics
(mathematics) to draw conclusions about population parameters
mutually exclusive [ANS:] Events that cannot occur at the same
time.
sampling error [ANS:] the difference between the results of
random samples taken at the same time
non-sampling error [ANS:] 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 [ANS:] short survey,
short/simple questions, start with demographic questions, ues
dichtomous (yes-no) and multiple choice
, 2
For Expert help and assignment solutions, +254707240657
Direct observation [ANS:] example: counts backpacks on campus
for a day
stratified random sample [ANS:] 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
© 2025 Assignment Expert
purchase of CD's. There are four types of CD's.
Joint Probability [ANS:] the probability of the intersection of two
events
Guru01 - Stuvia
Union of two events [ANS:] The union of events A and B is the
event containing all sample points that are in A or B or both
Marginal Probability [ANS:] the probability of a single event
without consideration of any other event
Conditional Probability [ANS:] the likelihood that a target behavior
will occur in a given circumstance
Bayes Law [ANS:] calculates posterior probability
exhaustive [ANS:] including everything possible; very thorough or
complete
Central Limit Theorem (CLT) [ANS:] The name of the theorem
stating that the sampling distribution of a statistic (e.g. x ) is
approximately normal whenever the sample is large and random.
Allows us to draw conclusions about the population based on
strictly sample data.
