Quantitative Research Techniques + Statistics - Peregrine.pdf file:///C:/Users/HP/Desktop/New%20fo/Quantitative%20Research%2
Peregrine - Quantitative Research Techniques +
Statistics
1. A company developed a smartphone whose average lifetime is unknown. In order to
estimate the average, 200 smartphones are randomly selected from alarge production line
and tested; their average is found to be 5 years.The 200smartphones represent
Answer a sample
2. Significance level
Answer Measures the reliability of a statistical inference
3. inferential statistics
Answer Process of using sample statistics (mathematics) to drawconclusions about population
parameters
4. mutually exclusive
Answer Events that cannot occur at the same time.
5. sampling error
Answer the difference between the results of random samples taken atthe same time
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,Quantitative Research Techniques + Statistics - Peregrine.pdf file:///C:/Users/HP/Desktop/New%20fo/Quantitative%20Research%2
6. non-sampling error
Answer occurs when the sample data are incorrectly collected, recorded, or analyzed. Three
types of errors
data acquisition errors, non-responseerrors (or bias), selection bias
7. Design of a good survey components
Answer short survey, short/simple questions,start with demographic questions, ues
dichtomous (yes-no) and multiple choice
8. Direct observation
Answer example
counts backpacks on campus for a day
9. stratified random sample
Answer a sample from selected subgroups of the target population in which everyone in
those subgroups has an equal chance of beingincluded in the research
example
The manager of a customer service division wants to know if the customersin the past 12 months
are satisfied with their purchase of CD's.There are four typesof CD's.
10. Joint Probability
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