# SOLUTION: 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. (Points: 4)

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 Algebra: Probability and statistics Solvers Lessons Answers archive Quiz In Depth

 Question 232004: 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. (Points: 4) Answer by stanbon(57282)   (Show Source): You can put this solution on YOUR website!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. ---------------- Rule: Equality Always appears in Ho. ---------------- Ho: u >= 80 Ha: u < 80 ================ Cheers, Stan H.