2.The liquid chlorine added to swimming pools to combat algae has a relatively short shelf life before it loses its effectiveness.Records indicate that the mean shelf life of a 5-gallon jug of chlorine is 2,160 hours (90 days).As an experiment, Holdlonger was added to the chlorine to find whether it would increase the shelf life.A sample of nine jugs of chlorine had these shelf lives (in hours):

Has Holdlonger increased the shelf life of the chlorine?Use the .05 level of significance.

2,1592,1702,1802,1792,1602,1672,1712,1812,185

AState the null hypothesis and alternate hypothesis

BHow many degrees of freedom are there?Is this 1 or 2 tail test?

CGive the decision rule, reject if?

DCompute the value of t obtained.

EDo you reject the null hypothesis?