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QUANTITATIVE RESEARCH TECHNIQUES
+ STATISTICS – PEREGRINE 2025
UPDATED ACTUAL EXAM WITH
CORRECT SOLUTIONS.
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
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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.
QUANTITATIVE RESEARCH TECHNIQUES
+ STATISTICS – PEREGRINE 2025
UPDATED ACTUAL EXAM WITH
CORRECT SOLUTIONS.
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
, 2 | Page
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.
