QUANTITATIVE RESEARCH TECHNIQUES
STATISTICS UPDATED ACTUAL EXAM
QUESTIONS AND CORRECT ANSWERS
●● 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
STATISTICS UPDATED ACTUAL EXAM
QUESTIONS AND CORRECT ANSWERS
●● 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
