QUANTITATIVE RESEARCH TECHNIQUES + STATISTICS PEREGRINE; Actual exam with 100% verified questions and correct answers |excellent scores

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QUANTITATIVE RESEARCH TECHNIQUES +
STATISTICS PEREGRINE; Actual exam with
100% verified questions and correct
answers |excellent scores



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




unbiased estimator - Correct-answer-a sample statistic which has an
expected value equal to the value of the population parameter

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Suppose a population of blue whales is 8000. Researchers are able to
garnish a sample of oceanic movements from 100 blue whales within
the population. Thus,



- researchers do not have a significant sample size

- researchers need a larger population of blue whales

- the finite population correction factor is necessary

- researchers can ignore the finite population correction factor -
Correct-answer-researchers can ignore the finite population correction
factor




In a sample proportion, represented by p = x/n, what does X refer to? -
Correct-answer-# of successes in the sample




The branches in a decision tree are equivalent to - Correct-answer-
events and acts




What is needed to compute posterior probabilities? - Correct-answer-
The sum of all the P(sj and li)'s, likelihood probabilities, p (li/sj)