In the Past,the Mean Battery Life for a Certain Type $9.5 \text { hours. }$

question 78

Multiple Choice

In the past,the mean battery life for a certain type of flashlight battery has been $9.5 \text { hours. }$ The manufacturer has introduced a change in the production method and wants to perform a hypothesis test to determine whether the mean battery life has increased as a result.The hypotheses are: H0 : ? = 9.5 hours
HA: ? > 9.5 hours
Explain the result of a Type II error.

• A)The manufacturer will not decide the mean battery life is greater than \(9.5 \text { hours }\) when in fact it is greater than \(9.5 \text { hours }\) .
• B)The manufacturer will decide the mean battery life is greater than \(9.5 \text { hours }\) when in fact it is \(9.5 \text { hours }\) .
• C)The manufacturer will decide the mean battery life is greater than \(9.5 \text { hours }\) when in fact it is greater than \(9.5 \text { hours }\) .
• D)The manufacturer will decide the mean battery life is 9.6 hours lower than it was prior to the change in the production method.
• E)The manufacturer will decide the mean battery life is 8.1 hours greater than it was prior to the change in the production method.

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