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Sprint would like to take customers from Pacific Bell, one of its competitors in a certain geographical area. Sprint would like to survey Pacific Bell's customers in order to find out which elements of its service are least satisfactory. Which of the following procedures would be most appropriate for obtaining a statistically unbiased sample?
Internal Consistency
A measure of the reliability of a test or scale, assessed by the degree of intercorrelation among the items within the test.
Effect Size
A quantitative measure of the strength of a phenomenon or the magnitude of a difference, used in statistical analysis.
Intervention's Effects
The effects of an intervention refer to the outcome or impact that a specific treatment, therapy, or preventative measure has on a condition, disorder, or situation.
Confounding Variable
A variable that influences both the dependent variable and independent variable, potentially skewing the results of a study.
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