The Technical Support Department at Apple, Inc

question 36

Short Answer

The technical support department at Apple, Inc.sampled 100,000 calls and reported that the mean of time a customer is placed on hold is 4.5 minutes.Assume a standard deviation of 1.75 minutes.Provide a 95% confidence interval estimate for the true average time a customer was placed on hold.

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Definitions:

Ordinal

Refers to data that represents categories with a meaningful order, but where the differences between the categories cannot be quantified.

Level Of Measurement

The nature of information within the values assigned to variables, which dictates the types of statistical analysis that can be performed.

Frequency Distribution

A summary of how often each value or range of values occurs in a data set.

Sample

A subset of individuals, items, or data extracted from a larger population, used for the purpose of analysis to infer conclusions about the population.