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In 1990, the average duration of telephone calls originating in one town was A telephone company ...

snowicefox17

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In 1990, the average duration of telephone calls originating in one town was A telephone company ...

In 1990, the average duration of

telephone calls originating in one town was

telephone company wants to perform a hypothesis test to determine whether the average duration of

phone calls has changed from the 1990 mean of

The mean duration for a random sample of

originating in the town was

Test whether the claim that the mean call duration has changed from the 1990 mean of

is supported or not supported. Assume that the population standard deviation is 4.5 minutes.

▸ supported

▸ not supported

Textbook

Statistical Reasoning for Everyday Life

Edition: 5^th

Authors: Bennett, Briggs, Triola

Read 82 times

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Matt. D.

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More solutions for this book are available here

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Thanks

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