QUANTITATIVE RESEARCH TECHNIQUES + STATISTICS
– PEREGRINE WITH COMPLETE SOLUTIONS
GUARANTEED PASS
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
Bayes Law - ANSWER ->calculates posterior probability
– PEREGRINE WITH COMPLETE SOLUTIONS
GUARANTEED PASS
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
Bayes Law - ANSWER ->calculates posterior probability
