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Quantitative Research Techniques + Statistics – Peregrine Exam Study Guide SolutionsQuantitative Research Techniques + Statistics – Peregrine Exam Study Guide Solutions A company developed a smartphone whose average lifetime is unknown. In order to estima $12.49   Add to cart
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Quantitative Research Techniques + Statistics – Peregrine Exam Study Guide SolutionsQuantitative Research Techniques + Statistics – Peregrine Exam Study Guide Solutions A company developed a smartphone whose average lifetime is unknown. In order to estima
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Quantitative Research Techniques + Statistics – Peregrine Exam Study Guide 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 ...

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  • November 19, 2024
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  • 2024/2025
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Quantitative Research Techniques +
Statistics – Peregrine Exam Study
Guide 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: -

ANSWER✔✔-a sample


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



Copyright ©SOPHIABENNETT 2025 ACADEMIC YEARALL RIGHTS RESERVED. Page 1/9

, 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 - ANSWER✔✔-the probability of a single event without

consideration of any other event


Conditional Probability - ANSWER✔✔-the likelihood that a target behavior will occur

in a given circumstance


Bayes Law - ANSWER✔✔-calculates posterior probability

Copyright ©SOPHIABENNETT 2025 ACADEMIC YEARALL RIGHTS RESERVED. Page 2/9

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