;

Upload all these pages $($questions answered$)$ with your EXCEL output to

CANVAS in pdf form. Round to $4$ decimal places during any steps in your

calculations and round your final answers to $4$ decimal places.

Work through the assignment in order, and show your work when required!!

It is highly recommended that you complete the relevant exercises in your

class notes before attempting this assignment.

A manufacturer of automobile batteries claims that his product will last

at least four years. A consumers' advocate group would like to evaluate

this longevity claim and selects a random sample of batteries. The data

below indicate the length of time $($in months$)$ that each of these batteries

lasted $($i$.$e$.$ performed properly before failure$).$

$(3$pts$)H_O$ :

$H_1$:

$(4$pts$)$ Does an assumption have to be made in this in this case to conduct

a test of hypothesis on the mean?

$($yes or no$?)$

ANSWER ONE OF THE FOLLOWING:

If not, why not? $($explain thoroughly and be specific$)$

If so$,$ what assumption do you have to make?

$($make sure you explain in context with respect to this particular situation$)$