ulty In the past, the mean running time for a certain type of flashlight battery

Question

ulty In the past, the mean running time for a certain type of flashlight battery has been 98 hours. The manufacturer has introduced a change in the production method and wants to perform a hypothesis test to determine whether the mean running time has increased as a result. The hypotheses are Ho: = 9.8 hours Ha : > 9.8 hours Suppose that the results of the sampling lead to rejection of the nul hypothess classity that concusion as a Type I error, a type til error or a decision, if in fact the mean running time has not increased O A Type l error B. Type Il error O c Correct decision O D can not be determined from this information

Explanation / Answer

We reject Ho and conclude that ruming time has been increased whereas in fact, it has not. So,

We are rejecting the true null hypothesis i.e. we are making a Type I error.

Option A is correct.

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