In a survey of recent smart phone buyers, 120 of 150 randomly selected Nokia buyers said they

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In a survey of recent smart phone buyers, 120 of 150 randomly selected Nokia buyers said they would “highly recommend” the phone to a friend, while 146 of 200 randomly selected Samsung buyers said the same about their phone. Are theses sample results sufficient to reject a “no difference” null hypothesis at the 5% significance level?
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Understanding Business Statistics

ISBN: 978-1118145258

1st edition

Authors: Stacey Jones, Tim Bergquist, Ned Freed

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