QUANTITATIVE RESEARCH
TECHNIQUES + STATISTICS –
PEREGRINE EXAM
QUANTITATIVE RESEARCH TECHNIQUES + STATISTICS – PEREGRINE EXAM |
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: - ACCURATE ANSWERS✔✔ a
sample
Significance level - ACCURATE ANSWERS✔✔ Measures the
reliability of a statistical inference
, inferential statistics - ACCURATE ANSWERS✔✔ Process of using
sample statistics (mathematics) to draw conclusions about population
parameters
mutually exclusive - ACCURATE ANSWERS✔✔ Events that cannot
occur at the same time.
sampling error - ACCURATE ANSWERS✔✔ the difference between
the results of random samples taken at the same time
non-sampling error - ACCURATE ANSWERS✔✔ 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 - ACCURATE ANSWERS✔✔
short survey, short/simple questions, start with demographic questions,
ues dichtomous (yes-no) and multiple choice
Direct observation - ACCURATE ANSWERS✔✔ example: counts
backpacks on campus for a day
stratified random sample - ACCURATE ANSWERS✔✔ 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
TECHNIQUES + STATISTICS –
PEREGRINE EXAM
QUANTITATIVE RESEARCH TECHNIQUES + STATISTICS – PEREGRINE EXAM |
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: - ACCURATE ANSWERS✔✔ a
sample
Significance level - ACCURATE ANSWERS✔✔ Measures the
reliability of a statistical inference
, inferential statistics - ACCURATE ANSWERS✔✔ Process of using
sample statistics (mathematics) to draw conclusions about population
parameters
mutually exclusive - ACCURATE ANSWERS✔✔ Events that cannot
occur at the same time.
sampling error - ACCURATE ANSWERS✔✔ the difference between
the results of random samples taken at the same time
non-sampling error - ACCURATE ANSWERS✔✔ 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 - ACCURATE ANSWERS✔✔
short survey, short/simple questions, start with demographic questions,
ues dichtomous (yes-no) and multiple choice
Direct observation - ACCURATE ANSWERS✔✔ example: counts
backpacks on campus for a day
stratified random sample - ACCURATE ANSWERS✔✔ 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
