As of 2012, Around How Many Kindles of All Types

question 50

Multiple Choice

As of 2012, around how many Kindles of all types have been sold in the United States?

• A) 8 million
• B) 80 million
• C) 800 million
• D) 8 billion

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Definitions:

Two-tail Test

A statistical test that is used to determine if there is a significant difference between a sample and a particular population mean, where the critical region is split between both tails of the distribution.

Population Proportion

A measure that describes the percentage of a specific characteristic in a population.

Z-test

An analysis technique that evaluates the difference in means between two populations with known variances and substantial sample sizes.

Nominal Data

Data categorized without a natural order or ranking, distinguished merely by name.