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Write a correct null and alternative hypothesis for testing…

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Write a correct null and...
Write a correct null and alternative hypothesis for testing the claim that the mean life of a battery for a cell phone is at least 80 hours.
Submitted: 8 years ago.Category: Math Homework
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Answered in 17 minutes by:
6/10/2010
Math Tutor or Teacher: Scott, MIT Graduate replied 8 years ago
Scott
Scott, MIT Graduate
Category: Math Homework
Satisfied Customers: 17,710
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Hi there,

 

The H0 will have the greaterthan/equal or lessthan/equal, while the Ha will have the greaterthan or lessthan.

 

H0: μ ≥ 80 (the mean is at least 80)

Ha: μ < 80 (the mean is less than 80)

 

Let me know if you have any questions, and if you're set, thanks for accepting!

-Scott

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