Quantitative Research
Techniques + Statistics –
Peregrine
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 Ans - a sample
Significance level Correct Ans - Measures the reliability
of a statistical inference
inferential statistics Correct Ans - Process of using
sample statistics (mathematics) to draw conclusions about
population parameters
mutually exclusive Correct Ans - Events that cannot
occur at the same time.
sampling error Correct Ans - the difference between the
results of random samples taken at the same time
non-sampling error Correct 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 Correct Ans -
short survey, short/simple questions, start with demographic
questions, ues dichtomous (yes-no) and multiple choice
Direct observation Correct Ans - example: counts
backpacks on campus for a day
