Test statistics as well as the stated life

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Reference no: EM13103434

An independent consumer testing lab preformed a statistical test on 25 type-C alkaline batteries as well as calculated the mean life for a particular use before they failed was 22.5 hours. The supply of the lives approximated a normal distribution. The standard deviation of the distribution was 1.1 hours. Info on the package states that the batteries must last 24 hours.

The test question was if this variance between the test statistics as well as the stated life of the battery was significant? The .05 important level was selected for the test. Which is the accurate statement?

Reference no: EM13103434

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