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2008,Apple filed for and received approval from the U.S.Patent and Trademark Office to trademark the "App Store" name to describe a service that allows its iPhone and iPad customers to purchase and download applications,video games,and other software.Over the past few years,Apple has invested millions in advertising and publicity and customers have purchased millions of dollars of software from its "App Store." However,Amazon.com and Microsoft both claim that Apple does not have exclusive rights to the name because other firms use it to describe their online storefronts where consumers can obtain software for smartphones and tablet devices.Apple has filed lawsuits against these firms,particularly Amazon,for violating its trademark.Why should Apple rigorously protect its "App Store" trademark?
Expected Frequency
The anticipated count in each category of a contingency table under the assumption that the null hypothesis is true, used in chi-square tests.
Null Hypothesis
The null hypothesis is a statement in statistical analysis that proposes no significant effect or no difference as the outcome of an experiment or study.
Level of Significance
The probability threshold under which the null hypothesis is rejected in hypothesis testing, denoted as alpha.
Null Hypothesis
A default position that there is no difference or effect in a particular situation, used as a starting point for statistical hypothesis testing.
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