A hypothesis test is to be performed. Determine the null and alternative hypotheses.
In the past, the mean running time for a certain type of flashlight battery has been 9.3 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 changed as a result.
1. practice, practice & more practice
2. review errors
3. master the key concepts
do not try to memorise the processes.
4. understand your doubts.
5. create a distraction free study environment
6. create a mathematical dictionary
7. apply maths to real world problems.
the correct answer is a.) bc< mn 5 stars if this you : )
da freeck kinda math is this just drop out